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Practical engineering, manufacturing and business tools to calculate, analyse and make better decisions.
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- Engineering & DesignMechanics, strength, springs, bearings and design checks.174
- Manufacturing & ProductionMachining, fabrication, operations, capacity and stock.141
- Machinery & Power TransmissionGears, drives, fasteners and threads.160
- Hydraulics & PneumaticsFluid power circuits, cylinders, pumps and compressed air.60
- Quality & MaterialsInspection, capability, tolerances and material behaviour.76
- Maintenance & ReliabilityAlignment, lubrication, oil cleanliness and asset life.18
- Projects & ImprovementProject health, planning, workload and improvement cases.17
- Business & CommercialCosting, quoting, investment and business decisions.39
- Reference & UtilitiesUnit conversion, geometry and engineering mathematics.53
Engineering & Design
Mechanics, strength, springs, bearings and design checks.
Axial Stress and Extension
What elastic stress and length change follow from this axial force?
Open toolBeam Stress and Deflection
What stress and deflection does this ideal beam model predict?
Open toolBearing L10 Life
How many hours will this rolling bearing run before 10% of a group would be expected to fail?
Open toolBearing Life for a Load and Speed Duty Cycle
What is the equivalent load and rating life of this bearing over a varying duty cycle?
Open toolBearing Static Load Ratio
How does the static load on this bearing compare with its static rating?
Open toolBolt Circle Coordinates
Where are the centres of equally spaced holes?
Open toolHole and Shaft Clearance Limits
What clearance or interference can occur at the size limits?
Open toolJournal Bearing Friction (Petroff) and Sommerfeld Number
What friction torque, power loss and Sommerfeld number does this lightly loaded journal bearing have?
Open toolMachine Noise Acceptance Test (Background Correction, Distance, Limit)
From my sound level readings with the machine running and stopped, what is the machine’s own noise, is the background low enough for a valid test, and does it meet the limit at the specified distance?
Open toolMachinery Noise: Machine Level, Combined Sources and Distance
How loud is this machine on its own, how loud are several sources together, and how does level fall with distance?
Open toolNoise Exposure Check (Combined Sources, Distance, Dose)
What sound level does the operator get from these machines at their working position, and is their daily noise dose within the limit?
Open toolO-Ring Groove Design (Depth, Width, Bore and Extrusion Gap)
What groove depth and width give my target squeeze and fill for this O-ring, what mating diameter does that set, and is the extrusion gap small enough?
Open toolO-Ring Squeeze, Stretch and Gland Fill
Will this O-ring have the right squeeze, stretch and gland fill in this groove?
Open toolOil Viscosity at Temperature
What is this oil’s viscosity at the operating temperature?
Open toolPlain Bearing Pressure, Velocity and PV
Are the pressure, sliding speed and PV of this bushing within the material’s limits?
Open toolRetention Method Selector
Which axial retention method suits this joint, and what will it cost over its life?
Open toolRolling Bearing Adjusted Rating Life
How many hours will this ball or roller bearing last at the required reliability?
Open toolRolling Bearing Friction Torque and Heat
How much friction torque and heat does this rolling bearing produce?
Open toolSection Properties
What area and bending properties follow from this section?
Open toolSigned Three-Term Tolerance Stack
What are the worst-case limits of this signed assembly dimension?
Open toolTaper Angle and Ratio
What half-angle and taper ratio match these dimensions?
Open toolThrust Bearing Pad Unit Load and PV
What unit load, sliding speed and PV does this pad or washer thrust bearing run at?
Open toolThrust Pad Bearing Check (Unit Load, PV, Friction Loss, Oil Flow)
Is this thrust bearing’s unit load and PV within limits, how much power does friction waste, and how much oil must flow through it to carry the heat away?
Open toolAverage Force of a Blow (Drop Hammer or Pile Driver)
What average force does this falling weight deliver when it drives the work a given distance?
Open toolBall-Screw Linear Axis Sizing
Can this ball screw and motor move the load at the speed and acceleration required, and how long will the screw last?
Open toolBand Brake Torque and Lever Force
What band tensions and lever force does this simple band brake need for the braking torque?
Open toolBelt, Rope and Band Friction (Capstan)
What is the most tension the tight side can hold for this wrap and friction?
Open toolBlock and Tackle Check (Pull with Sheave Friction, Rope and Operator)
What pull does this block and tackle need at the fast line once sheave friction is counted, is the rope strong enough, and can one person pull it by hand?
Open toolBrake Dynamometer Test and Cooling Plan (Power, Water Flow, Water Use)
How much power is my prony brake or absorption dynamometer taking, how much cooling water does it need for the temperature rise I allow, and do my brake rating and water supply cover it?
Open toolBuffer Stop Design (Impact Energy, Stroke, Force and Deceleration)
What buffer stroke stops this moving carriage within my force and deceleration limits, and what peak force reaches the end stop structure?
Open toolCable Span Design (Catenary Sag, Tension, Clearance and Stretch)
What tension does this cable carry across its span at the sag I want, is it strong enough, does the low point keep its clearance, and how much does it stretch?
Open toolCam and Spring-Loaded Follower Design
Will this cam’s follower stay in contact at speed, what spring preload does it need, and is the pressure angle acceptable?
Open toolCam Follower Return Spring Check (Inertia Force, Jump Speed)
Is my follower return spring strong enough to keep the follower on the cam at this speed, and at what speed will the follower start to jump?
Open toolCatenary Cable Sag, Tension and Length
What tension and length does a cable or chain of this weight have when it sags this much over the span?
Open toolCentrifugal Force on a Rotating Mass
What outward force does this rotating mass exert?
Open toolCentrifugal Load on a Bolted Attachment (Overspeed and Bolt Stress)
What pull does centrifugal force put on the bolts holding this mass to a rotor, does it stay within the bolt allowable at overspeed, and at what speed would it reach the limit?
Open toolCombined Centre of Gravity
Where is the centre of gravity of these combined masses?
Open toolCounterbalancing Masses in One Plane
What counterweight, at what angle, balances these masses rotating in one plane?
Open toolCrane Load Swing Check (Pendulum Period, Swing, Rope Tension)
If the trolley stops suddenly, how far will this hanging load swing, how long is each swing, and how much extra pull does the swing put on the rope?
Open toolCrane or Trolley Wheel on Rail (Contact Stress, Wheel Pressure, Travel Force)
Is this crane or trolley wheel big enough for its load on the rail, and what force and power does it take to roll the machine along?
Open toolDrive Shaft Torsional Check (Natural Frequency, Resonance Margins, Stress, Twist)
Does the torsional natural frequency of my motor, shaft and load fall clear of the running-speed excitations, and are the shaft stress and twist acceptable?
Open toolFly-ball (Porter) Governor Height and Sensitivity
At what height does this fly-ball governor run at this speed, and how sensitive is it?
Open toolFlywheel Energy and Speed Fluctuation
How much energy does this flywheel give up between two speeds, and is its rim speed acceptable?
Open toolFlywheel Rim Design (Inertia for Speed Fluctuation, Size and Stress)
What inertia does this flywheel need to hold the speed fluctuation within limits, what disc size gives it, and is the rim speed and stress safe?
Open toolGeneva Drive Design (Acceleration, Pin Force and Drive Torque)
How hard does this Geneva wheel accelerate the load, what force does the drive roller see, and what torque must the driver supply?
Open toolGeneva Wheel Indexing Mechanism
What crank radius and wheel size does a Geneva drive need, and how long are its index and dwell?
Open toolGyroscopic Bearing Load on a Turning Rotor
When the machine carrying this spinning rotor turns or swings, what gyroscopic couple acts, and what total load does each bearing then carry?
Open toolGyroscopic Couple and Bearing Reactions
What gyroscopic couple does this spinning rotor exert when its axis is turned, and what load does it put on the bearings?
Open toolImpact Energy and Stopping Force
What energy and force result when this mass is stopped over a short distance?
Open toolImpulse, Momentum and Collisions
What average force changes this body’s velocity in the time available, and how do two bodies move after they collide?
Open toolInclined Plane and Friction
What force pushes, holds or lowers a load on this slope?
Open toolLever Force with Several Loads
What effort balances these loads on a lever, or how long must the effort arm be?
Open toolLifting Beam and Spreader Beam Check
Is this lifting beam or spreader bar strong and stiff enough for the load, and what are the sling tensions?
Open toolMachine Foundation Block Sizing
How big a concrete block does this machine need, will the soil carry it, and is the block clear of resonance?
Open toolMachine Levelling Wedge Check (Drive Force, Self-Locking, Travel)
Can these levelling wedges lift my machine with the force I can apply, will they stay put under load, and is there enough wedge travel for the height adjustment?
Open toolMachine Tipping Stability (Overturning, Safety Factor, Anchors)
Will this free-standing machine or cabinet tip over under a sideways acceleration or push, and if so, what anchor force holds it down?
Open toolMass Moment of Inertia
What is the mass moment of inertia of this body about the chosen axis?
Open toolMass Moment of Inertia: Cone, Torus, Ellipsoid and Shells
What is the mass moment of inertia and radius of gyration of this body?
Open toolOutdoor Cabinet or Machine Wind Tipping and Sliding Check
Will this free-standing cabinet, tank or machine outdoors tip over or slide in the design wind, and if so what anchor tension is needed?
Open toolPendulum Period: Simple, Compound, Conical and Torsional
What is the period of this pendulum, and how much does a large swing change it?
Open toolPermissible Residual Unbalance (Balance Grade)
How much residual unbalance is allowed for this rotor and balance grade?
Open toolPoint-to-Point Move Time
How long does this axis or conveyor move take with the given speed and acceleration?
Open toolPorter Governor Check (Heights, Sleeve Travel, Ball Radius, Centrifugal Force)
Over its control range, how far does this loaded fly-ball governor’s sleeve move, where do the balls run, and what centrifugal force do they carry?
Open toolPower Screw Raise and Lower Torque
What torque raises and lowers this load with a screw jack or lead screw, including collar friction?
Open toolProny Brake and Absorption Dynamometer Power
How much power is the machine delivering according to the brake arm, scale reading and speed?
Open toolPunch and Shear Flywheel Sizing
What motor power and flywheel rim does this punch or shear need for its energy per stroke?
Open toolPusher or Transfer Move Check (Motion Profile, Force, Stop Impact)
What acceleration, speed and force does my pusher need to move this part over the stroke in the time I want, and how hard will it hit if it stops against a hard stop at full speed?
Open toolRack and Pinion Axis Sizing
What pinion torque, motor torque and gear ratio does this rack-and-pinion axis need, and are the teeth strong enough?
Open toolRamp Winch Pull Check (Pull, Holding Force, Power)
What pull does my winch need to haul this load up the ramp on wheels or skids, will the load run back if released, and is the winch power enough at the haul speed?
Open toolResultant of Concurrent Forces
What single force is equivalent to these forces acting at one point?
Open toolResultant of Non-Concurrent and Parallel Forces
What single force and line of action replaces these forces acting at different points?
Open toolRolling Resistance of Wheels and Rollers
What force does it take to keep this wheeled load rolling, and how does that compare with sliding it?
Open toolRope Winch Drum and Capstan (Wraps, Holding Pull, Torque, Power)
How many turns of rope around this drum let a small tail pull hold the load, what torque and power does the drum need, and is the rope strong enough?
Open toolRotary Index Table Drive Sizing
What torque and motor does this rotary index table need to index in time, and what holding torque during machining?
Open toolRotor Balancing Check (Grade, Plane Unbalance and Corrections)
Is this rotor within its balance grade in each correction plane, and if not, what correction masses go where?
Open toolScrew Jack and Power Screw Design
What torque and lever force raise this load, will the screw self-lock, and are the threads, nut and screw strong enough?
Open toolShear Legs (A-Frame) Check (Geometry, Leg Force, Foot Thrust, Buckling)
For a pair of shear legs (an A-frame) lifting this load, what is the head height and leg angle, what force does each leg carry, how hard do the feet push apart, and will the tube legs buckle?
Open toolShoe Brake Stop Check (Stopping Torque, Lever Force, Lining Pressure, Heat)
What braking torque stops this rotating load in the time I want, what lever force does my shoe brake need, and are the lining pressure and drum temperature rise acceptable?
Open toolSingle Shoe (Block) Brake
What lever force does this block brake need, and is it self-energising or self-locking?
Open toolSling Leg Tension
What tension does each sling leg carry at this angle, and is it within the rating?
Open toolSnatch Block and Anchor Load Check (Rope Angle, Resultant, Ratings)
When my winch rope turns through a snatch block, what load does the block and its anchor take at this rope angle, and are the block, anchor and rope rated for it?
Open toolThree-Leg Sling Load Share (3D Leg Geometry, Tensions, Angles)
For a three-leg sling to lift points that are not symmetric, how is the load shared between the legs, how long is each leg, and is any leg overloaded or too steep?
Open toolToggle Clamp Design (Cylinder, Toggle Angle and Clamping Force)
What clamping force will this cylinder-driven toggle give at its locking angle, at what angle is the required force reached, and are the links strong enough?
Open toolToggle Joint Force
What output force does this toggle joint produce for the applied force?
Open toolTorque to Accelerate a Rotating Load
How much torque does it take to bring this rotating load up to speed in the time allowed?
Open toolTorsional Natural Frequency of a Drive
At what frequency will this motor-and-load drive resonate in torsion, and is that safely above the control bandwidth?
Open toolTwo-Plane (Dynamic) Balance Corrections
What correction masses in two planes give this rotor a running (dynamic) balance?
Open toolTwo-Point Lift with an Off-Centre Load (Centre of Gravity, Leg Loads, Angles)
Where is the centre of gravity of this combined load, how is the weight shared between the two lifting points, and what does each sling leg carry at its angle?
Open toolUniformly Accelerated Motion and Falling Bodies
How fast and how far does this body travel under constant acceleration, or how fast does it hit the ground?
Open toolVibration Isolator Selection
What mount stiffness and static deflection isolate this machine at its running speed, and how well do my chosen mounts work?
Open toolWedge Force with Friction
What force drives this wedge under a load, and will it stay in place?
Open toolWind Load on a Sign or Panel Post (Force, Base Moment, Stress, Deflection)
What wind force does this sign or panel take, what bending stress does it put in the supporting tube post, and how far does the top deflect?
Open toolWind Pressure and Force on a Surface
What force and overturning moment does wind at this speed put on this sign, guard or structure?
Open toolWindlass, Gear Hoist and Differential Pulley Effort
What effort lifts this load with a windlass, geared winch, rope block or differential chain pulley?
Open toolWire Rope Reeving: Line Pull and Safety Factor
What pull is on the hoist rope with this reeving, and is the rope’s safety factor enough?
Open toolBeam Cases: Fixed, Guided, Propped and Partial Loads
What moments and deflection does this less common beam case give?
Open toolBeam Cases: Off-Centre, Fixed and Propped
What reactions, moment, stress and deflection does this beam case give?
Open toolBeam Drop Impact Check (I-Section Properties, Impact Factor, Dynamic Stress)
If a load drops onto this I-beam, what impact factor, dynamic stress and deflection result, and is the section strong enough?
Open toolBeam Sizing for Strength and Deflection
What section modulus and second moment of area does this beam need for its loads, span and deflection limit?
Open toolC-Frame Throat Check (Curved-Beam Stress, Straight-Beam Comparison, Depth Needed)
Is the throat of this C-frame press or clamp strong enough, how much does the inside corner curvature raise the stress, and what throat depth would meet my allowable?
Open toolCircular Cover Plate Design (Thickness for Stress and Deflection)
How thick must this flat circular cover be to carry the pressure within the allowable stress and deflection, and what end force does it put on the bolts?
Open toolCircular Flat Plate under Pressure
What stress and deflection does uniform pressure cause in this round plate?
Open toolColumn Buckling (Euler and Johnson)
What load will buckle this column or strut, and is the safety factor enough?
Open toolColumn Formula Comparison (Rankine, Euler and Classic Safe Load)
How do the Rankine, Euler and classic working-stress column formulas compare for this strut, and does it carry my load by each?
Open toolColumn Strength by Rankine–Gordon
What load will this column carry by the Rankine–Gordon formula?
Open toolCombined Axial and Biaxial Bending Stress
What are the corner stresses in this rectangular section under axial load and bending about both axes?
Open toolCompression Strut Sizing (Euler or Johnson, Round Bar or Tube)
What is the smallest round bar or tube that carries this compressive load with my safety factor against buckling, and how does my chosen size compare?
Open toolContinuous Beam over Two Spans
What reactions, moments and deflections does this beam continuous over three supports have?
Open toolCrane Hook Design (Curved-Beam Stress, Proof Load and Shank)
Is this lifting hook strong enough at its working load and proof load, allowing for the curvature, and is the threaded shank strong enough?
Open toolCurved Beam and Hook Stress
What are the inner and outer fibre stresses in this curved beam or hook section?
Open toolDrop Impact on a Beam (Impact Factor, Stress and Safe Drop Height)
How much stress and deflection does a mass dropped on this beam cause, and from what height can it fall before the beam is overstressed?
Open toolEccentrically Loaded Column (Secant Formula)
What is the peak stress in this column with an offset load, and what load factor brings it to yield?
Open toolFatigue Design Check (Corrected Endurance, Notch, Mean Stress, Life)
Will this notched part survive its fluctuating load indefinitely, and if not, how many cycles will it last?
Open toolFatigue Life from the S-N Curve (Steel)
How many cycles will this steel part survive at this alternating stress?
Open toolFatigue Notch Factor from Stress Concentration
How much does this notch, fillet or groove reduce fatigue strength?
Open toolFatigue Safety Factor (Goodman)
Is this fluctuating stress safe for infinite life by the Goodman, Soderberg and Gerber criteria?
Open toolHertz Contact Stress
What contact pressure develops between these curved bodies under load?
Open toolHollow Shaft Conversion (Brittle Material, Size, Weight, Twist)
If I make this cast-iron (brittle) shaft hollow, what outside and bore diameters keep it as strong, how much weight do I save, and does it still fit and stay stiff enough?
Open toolImpact Load on a Beam
What stress and deflection does a dropped weight cause in this beam?
Open toolInterference Fit at Operating Temperature (Different Materials)
If the hub and shaft are different materials, how much interference is left at the operating temperature, does the fit still hold the torque hot, and is the hub overstressed at its tightest?
Open toolInterference Fit Limits Check (IT Grades, Least and Most Interference, Torque, Stress)
With the hole and shaft tolerances I have chosen, will the fit still hold the torque at its least interference, and will the hub be overstressed at its most?
Open toolLifting Lug Design (Plate, Pin and Bearing Checks)
Is this pinned lifting lug strong enough for the sling load: net tension, tear-out, bearing and pin shear?
Open toolOverhang Beam with Tip Load (Uplift, Anchor Bolts, Tip Deflection)
For a beam on two supports with a load out on an overhang, how hard does the back support have to hold the beam down, are the anchor bolts enough, and how far does the tip drop?
Open toolOverhanging Beam
What reactions, moments and deflections does this beam with overhanging ends have?
Open toolPress and Shrink Fit Pressure and Holding Torque
What contact pressure, hub stress and holding torque does this interference give?
Open toolPressure Cylinder Wall Stress
What stresses does internal pressure cause in this tube or cylinder wall?
Open toolPressure Vessel Shell and Head Thickness Comparison
What wall thickness does this vessel shell need, and how do hemispherical, ellipsoidal and torispherical heads compare?
Open toolPrincipal Stresses and von Mises
What are the principal stresses, maximum shear and von Mises stress for this stress state?
Open toolRectangular Bar in Torsion
What shear stress and twist does torque cause in this rectangular or square bar?
Open toolRestrained Bar Heating (Thermal Stress, Yield and Buckling)
When this bar or pipe is held between fixed supports and heats up, does the thermal stress stay below yield, and will it buckle before then?
Open toolRestrained Thermal Stress
What stress and force build up if this member is prevented from expanding?
Open toolRotating Disc Stress and Burst Margin
What stress does spinning cause in this solid or bored disc, and how fast can it run before yield?
Open toolRound Shaft under Axial Load, Bending and Torsion
What are the combined stresses in this round shaft or bar, and is it safe against yield?
Open toolSection Properties: Ellipse, Hexagon, Triangle, Z and Cross
What are the area, second moments and section moduli of this section?
Open toolSection Properties: I, T, Channel and Angle
What are the area, centroid, second moments and section moduli of this I, T, channel or angle section?
Open toolShaft Critical (Whirling) Speed
At what speed will this shaft whirl, and is the running speed clear of it?
Open toolShaft Critical Speed with Several Masses (Dunkerley and Rayleigh)
What is the first critical speed of this simply supported shaft carrying several discs or pulleys, and is the running speed safely clear of it?
Open toolShaft Deflection and Bearing Slope (Up to Three Loads)
How far does this shaft bend under its gear and pulley loads, how much do the ends tilt in the bearings, and is the bending stress acceptable?
Open toolShaft Design: Strength, Twist and Critical Speed
What shaft diameter satisfies strength, torsional stiffness and critical speed together for this drive?
Open toolShaft Diameter for Bending and Torsion
What shaft diameter carries this bending moment and torque at the allowable shear stress?
Open toolShaft Diameter for Brittle Materials and Hollow Shafts
What diameter does this shaft need by the maximum-normal-stress theory, and how does a hollow shaft compare?
Open toolShrink or Press Fit Design from Required Torque
What interference does a hub need to transmit this torque and thrust, will the hub survive it, and how hot must it be to assemble?
Open toolSpherical Pressure Vessel Design (Thickness, Stress, Capacity, Hydrotest)
How thick must this spherical vessel be for its pressure, what stress and safety factor does the chosen plate give after corrosion, what does it hold and weigh, and is the hydrotest within limits?
Open toolSpherical Shell under Internal Pressure
What stress does internal pressure cause in this spherical vessel or dished end?
Open toolSquare and Rectangular Flat Plates
What stress and deflection does this square or rectangular plate have under load?
Open toolSteel Column Safe Stress (Classic AISC Formulas)
What safe unit stress and load do the classic AISC column formulas give for this slenderness?
Open toolTank Wall Panel under Liquid Pressure (Force, Plate Stress, Deflection)
What liquid pressure and force act on this flat tank wall, and is a panel between stiffeners thick enough in stress and deflection?
Open toolThin-Walled Closed Tube in Torsion
What shear stress and twist does torque cause in this thin-walled round or rectangular tube?
Open toolThree-Dimensional Principal Stresses
What are the three principal stresses, maximum shear and von Mises stress for this 3D stress state?
Open toolTorsion Member Comparison (Solid Bar, Tube or Rectangle)
For this torque, how do a solid round bar, a round tube and a rectangular bar compare in shear stress, twist and weight, and does the one I chose pass?
Open toolTriaxial Stress Check (Principal Stresses, von Mises, Tresca, Strains)
For this three-dimensional stress state, what are the principal stresses, how close is it to yield by von Mises and by Tresca, and what strains will a gauge or a fit see?
Open toolTube Collapse under External Pressure
At what external pressure will this long tube collapse, and is the margin enough?
Open toolTube or Shell under External Pressure (Collapse Thickness and Factor)
How thick must this long tube or vacuum shell be to resist collapse under the outside pressure, and what safety factor does the chosen wall give after corrosion?
Open toolTube Post with Eccentric Load (Section, Secant Formula, Load Factor)
Is this round tube post or column safe under a load applied off its centreline, and how much more load would bring it to yield?
Open toolTwo-Span Stringer Check (Continuous Beam, Deflection, Support Reactions)
Is a beam running continuously over three supports strong and stiff enough for this load, and can the middle support take its share?
Open toolVertical Storage Tank Shell Thickness by Course
How thick must each shell course of this vertical liquid storage tank be, and what does the shell weigh?
Open toolCompression Spring Designer (Two Working Points)
What wire size, coils and free length make a compression spring that gives these two loads at these two lengths?
Open toolCompression Spring Fatigue Check (Working Stroke, Goodman Factor)
Will this compression spring survive millions of cycles between its preload and working lengths, by the Goodman criterion and against first-cycle yield?
Open toolDisc (Belleville) Spring Load and Stress
What force and stress does this disc spring, or stack, give at a deflection?
Open toolDisc Spring Stack Design
How many disc springs in series and in parallel give this force over this stroke?
Open toolExtension Spring Designer (Body, Hooks, Initial Tension, Frequency)
Will this extension spring carry its working load without overstressing the body or the hooks, is the initial tension sensible, and how high is its natural frequency?
Open toolFlat and Leaf Spring
How much does this flat or leaf spring deflect, and how highly is it stressed?
Open toolHelical Compression Spring Design Check
What rate, load and stress will this compression spring have at its working length?
Open toolHelical Extension Spring Check
What load and body stress will this extension spring have at its working extension?
Open toolHelical Torsion Spring Check
How far will this torsion spring wind, how highly stressed is it and will it still fit its arbor?
Open toolLid Counterbalance with Torsion Springs (Balance, Handle Force, Spring Stress)
Will these torsion springs counterbalance my hinged lid so it is easy to lift and stays open, and are the springs within stress when wound up?
Open toolNested Compression Spring Check (Load Share, Stresses, Solid Length, Clearance)
If I nest an inner spring inside an outer one, what load does the pair give at the working length, how is it shared, are both springs within stress, and do they fit together?
Open toolSemi-Elliptic Leaf Spring Design (Leaves for Stress and Deflection)
How many leaves does this semi-elliptic spring need for the load within the allowable stress and deflection, and what rate will it have?
Open toolSprings in Series or Parallel
What is the combined rate of these springs, and how is the load shared?
Open toolSquare versus Round Wire Spring Comparison (Rate, Load, Stress, Solid Length)
In the same space, would a square-wire or a round-wire compression spring of the same size give me the load I need within stress?
Open toolSquare-Wire Compression Spring
What rate, load and stress does this square-wire compression spring have?
Open toolTorsion Bar Spring
What rate, twist and shear stress does this torsion bar spring have?
Open toolTorsion Bar Spring Design (Diameter for Stress and Twist)
What diameter must this torsion bar be to carry the torque within the allowable shear stress and twist, and what rate and stroke will it give?
Open toolTorsion Spring Designer (Angle, Stress, Legs and Arbor)
How far will this torsion spring wind under the load, is the bending stress within the allowable, and will it still clear the arbor when wound up?
Open toolManufacturing & Production
Machining, fabrication, operations, capacity and stock.
Angular Cutter or Taper Reamer Fluting Set-up (Head Angle and Indexing)
To flute an angular cutter or taper reamer blank on a dividing head, at what angle do I set the head and what index setting moves between teeth?
Open toolAnodizing Plan (Time, Current, Tank Heat, Loads and Cost per Part)
How long does this anodizing load take to reach thickness, can the rectifier supply it, how much heat must the tank cooling remove, and what does each part cost?
Open toolAnodizing Time and Coating Thickness
How long must this part anodize to reach the coating thickness, and how much current is needed?
Open toolBall-Nose Effective Diameter
What cutting diameter is engaged at this shallow axial depth?
Open toolBall-Nose Finishing Plan (Stepover, Speed, Feed and Time)
What stepover gives my target cusp height with this ball-nose cutter, what speed suits its effective diameter, and how long will finishing the area take?
Open toolBall-Nose Scallop Height and Stepover
What scallop height does this stepover leave, or what stepover gives the target height?
Open toolBand Saw Cutting Time
How long does each cut take on the band saw, and how many cuts per hour?
Open toolBandsaw Cutting Plan (Time, Bars, Blades and Cost per Cut)
How long will this batch of saw cuts take, how many bars and blades will it use, and what does each cut cost?
Open toolBar Stock for Screw Machine Parts
How many parts does each bar give, and how much bar stock do I order for this quantity?
Open toolBar Stock Plan for Bar-Fed Parts (Bars, Yield, Material Cost, Machine Time)
How many bars do I need for this batch of bar-fed parts, how much of the bar ends up as parts, what does the material cost, and how long will the run take?
Open toolBoring Bar Deflection
How far will this boring bar deflect under the cutting force, and is the overhang reasonable?
Open toolBroach Tooth Pitch
What tooth pitch should this broach have for its chip space and machine capacity?
Open toolBroaching Plan (Pitch, Teeth, Force, Broach Length and Time)
What tooth pitch and how many teeth does this broach need, what pull does it take, how long is the broach, and how long does each part take?
Open toolCenterless Grinding Through-Feed Rate
How fast do parts pass through this centerless grinder, and how many per minute?
Open toolChip Thickness and Specific Cutting Force
What mean chip thickness does this cut produce, and what specific cutting force results?
Open toolCircular Interpolation Feed
What tool-centre feed gives the specified feed around a circular wall?
Open toolCNC Arc Linearisation Chord Error
What chord error do these line segments leave on an arc, or what segment length meets a tolerance?
Open toolCountersink Depth and Breakthrough
How deep is this countersink, and will it reach the opposite face?
Open toolCutting Speed and Spindle RPM
What RPM corresponds to the chosen cutting speed?
Open toolCutting Speed or Feed for Full Machine Power
How fast can this cut run before it uses all the available spindle power?
Open toolCutting Tool Deflection and Depth-of-Cut Limit
How far will this end mill or boring bar deflect under the cut, and what depth keeps it within tolerance?
Open toolCylindrical Grinding Planner (Traverse: Speeds, Power and Time)
What wheel and work speeds, removal rate and spindle power does this traverse cylindrical grinding job need, and how long will it take?
Open toolDividing-Head Angle for Milling Clutch Teeth
At what angle must the dividing head be set to mill these saw-tooth or V-shaped clutch teeth?
Open toolDividing-Head Setting for Fluting Angular Cutters and Taper Reamers
At what angle do I set the dividing head to flute the teeth of this angular cutter or taper reamer?
Open toolDowntime Cost
What does downtime really cost?
Open toolDrill Sizes: Number, Letter, Fraction and Metric
What is the decimal size of this number or letter drill, or which drills are closest to a size?
Open toolDrilling Cycle Planner (Speed, Feed, Thrust, Power and Time)
What speed and feed do I run this drill at, will the machine and workholding take the thrust, and how long will the holes take?
Open toolDrilling Power, Torque and Thrust
What power, torque and thrust does this drill need?
Open toolDrilling Travel and Time
What feed travel and time does a through-hole need?
Open toolElectroplating Plan (Time, Current, Loads and Cost per Part)
How long must this load plate to reach the thickness, can the rectifier supply the current, how many loads does the batch take, and what does it cost per part?
Open toolElectroplating Thickness and Time (Faraday)
How long must this part be plated to reach the thickness, and what current does it need?
Open toolEquivalent Chip Thickness (ECT) and Cutting Forces
What equivalent chip thickness, removal rate, cutting force and power does this turning cut give?
Open toolFinish Turning Set-up (Feed for Finish, Nose-Radius Compensation, Time)
What feed gives my surface finish with this insert nose radius, how much does the nose radius distort a chamfer or taper if not compensated, and how long is the finishing pass?
Open toolFixture Clamping Force and Clamp Screw Torque
How much clamping force holds this workpiece against the cutting forces, and how tight must each clamp screw be?
Open toolForming Tool Step Depths and Angles
What depth and angle must I grind on a flat or circular forming tool to produce these steps on the work?
Open toolGrinding Equivalent Diameter and G-Ratio
What is the equivalent wheel diameter for this cylindrical grind, and what G-ratio was achieved?
Open toolGrinding Wheel Speed and Removal Rate
Is this wheel running within its marked maximum speed, and what removal rate does the grind give?
Open toolInjection Moulded Part Cost (Clamp, Cycle, Machine, Material, Mould)
Will my moulding machine run this mould, how many parts an hour will it make, and what does each part cost in machine time, plastic and mould against my target price?
Open toolInjection Moulding Clamp, Shot, Cooling and Cycle Estimate
What clamp force and shot size does this mould need, how long will it take to cool, and how many parts per hour will it make?
Open toolInverse Time Feed Rate (G93)
What inverse-time F value programs this move at the feed I want?
Open toolJaw Clutch Milling Set-up (Dividing-Head Angle and Indexing)
To mill the teeth of this jaw clutch on a dividing head, at what angle do I tilt the head, and what index setting moves from one tooth to the next?
Open toolKnurling Blank Diameter for Tracking
What blank diameter lets this knurl track cleanly with a whole number of teeth?
Open toolKnurling Set-up (Tracking Blank Diameter, Speed, Time)
Will my knurl track on this blank diameter, what diameter should I turn to instead, and what speed and time does the knurling pass need?
Open toolLathe Chuck Grip Force and Speed Limit
How much grip does the chuck need to hold this cut, how much is lost at speed, and how fast can it safely run?
Open toolMachine Coolant System Sizing
How much coolant flow, tank volume and pump power does this machine need?
Open toolMachine Load
How heavily loaded is this machine?
Open toolMachine Spindle Speed Range Design (Geometric Series and Speed Loss)
What spindle speed range covers my diameters and cutting speeds, what step ratio do my number of speeds give, and how much cutting speed is lost between steps?
Open toolMilling Cut Planner (Speed, Thinned Feed, Power and Torque)
What spindle speed and feed should I program for this milling cut, and will the machine have the power?
Open toolMilling Feed, Removal Rate and Time
What feed, removal rate and cutting time follow from this setup?
Open toolMilling Power and Spindle Torque
What power and torque does this milling cut need, and can the spindle deliver it?
Open toolMilling Time and Cost per Part with Tool Life
How long does this milling operation take and what does it cost per part, including tool wear and set-up?
Open toolMulti-Start Thread Turning Set-up
What lead, start spacing and Z shift do I program to turn this multi-start thread?
Open toolNumber of Teeth for a Milling Cutter
How many teeth should this face mill or peripheral cutter have for the cut and the power available?
Open toolPolygon Milling Set-up (Stock Size, Depth of Cut, Indexing)
To mill a hexagon (or any regular polygon) on round bar, what stock diameter do I need for sharp corners, how deep is each flat, and what index setting moves between flats?
Open toolRack and Batch Fit
How many parts fit on a rack, jig or tray?
Open toolRadial Chip-Thinning Feed
How does reduced radial engagement change feed per tooth?
Open toolRotary Axis Feed Plan (Inverse-Time Feed and Axis Rate Limits)
For this combined linear and rotary move, what inverse-time feed gives my cutter feed, do the rotary and linear axes stay within their rate limits, and what feed is actually achievable?
Open toolScrap Cost Impact
What is scrap costing you?
Open toolSetup Reduction Value
Is reducing setup time worth the investment?
Open toolSmall Cutter and Drill Stiffness and Deflection
How much stiffness do I lose by choosing a smaller or longer micro end mill or drill, and how far will it deflect?
Open toolSmall Tool Substitution Check (Stiffness Change, Deflection, Feed to Hold Tolerance)
If I swap to a smaller or longer micro tool, how much stiffness do I lose, how far will it deflect under the cutting force, and what feed keeps deflection within my limit?
Open toolSpade Drilling Plan (Speed, Power, Thrust, Time)
At my cutting speed and feed, what power and thrust does this spade drill need, will the machine take it, and how long is each hole?
Open toolSpade Drilling Power and Thrust
What power and thrust does this spade drilling operation need?
Open toolSpeeds and Feeds in Inch Units
What spindle speed and feed rate follow from this SFM and chip load?
Open toolStock Removal Plan (Bar Volume, Chips, Machining Time, Power)
How much of this bar blank turns into chips, how long does it take to remove at my cutting conditions, and does the machine have the power?
Open toolSurface and Cylindrical Grinding Cycle Time
How long will this surface, traverse or plunge grinding operation take?
Open toolSurface Grinding Planner (Speeds, Removal Rate, Power and Time)
What wheel speed, removal rate and spindle power does this surface grinding job need, and how long will it take?
Open toolTapping Feed and Thread Lead
What synchronous feed matches this thread lead?
Open toolTaylor Tool Life and Economic Cutting Speed
How long will the tool last at this speed, and what speed gives the lowest cost per part?
Open toolThread Milling Plan (Speed, Feeds, Radial Passes and Batch Time)
What spindle speed and programmed feed does this thread mill need, how many radial passes for the depth, and how long will a batch of threads take?
Open toolThread Milling Tool Path and Feed
What tool-centre path and programmed feed does this helical thread milling operation need?
Open toolThrough-Feed Centerless Grinding Plan (Feed, Passes, Output, Angle)
How many parts per hour will this through-feed centerless set-up give with the passes the stock needs, and what regulating-wheel angle would reach my target?
Open toolTool Nose Radius Compensation for Tapers
How far must the programmed taper line move to allow for the insert nose radius?
Open toolTooling Payback
How quickly will new tooling pay back?
Open toolTurning Cusp Height
What ideal peak-to-valley cusp follows from feed and nose radius?
Open toolTurning Cut Planner (Speed, Power, Torque, Finish and Time)
What spindle speed, power and torque does this turning cut need, what surface finish will the feed and nose radius give, and how long will it take?
Open toolTurning Cutting Force and Power
What cutting force, power and torque does this turning cut need, and can the machine deliver it?
Open toolTurning Cycle Time and Cost per Part with Tool Life
What does each turned part cost at this speed, and how much would the minimum-cost speed save?
Open toolTurning Feed and Cutting Time
How long will a straight turning pass take?
Open toolTurning Feed for Surface Finish (Ra)
What surface finish does this feed and nose radius give, or what feed achieves the target Ra?
Open toolYield and First-pass Yield
How much good output are you getting from input?
Open toolAngle Ring Cut Plan (Cut Length, Bars, Joints, Waste, Mass)
How long do I cut angle or flat bar to roll into rings for this shell, how many stock bars and joints do I need, and how much is wasted?
Open toolBent Bracket Plan (Flat Blank, Bend Force, Springback)
For this bent sheet-metal bracket, what flat blank do I cut, what press brake force do the bends need, and to what angle must I bend to allow for springback?
Open toolCarbon Equivalent and Weldability
What carbon equivalent does this steel have, and does it suggest preheat?
Open toolCasting Gating System Choke Area
What choke (sprue) area fills this mould in the planned pouring time?
Open toolCasting Pour Plan (Riser, Feed Volume, Gating and Ladle)
Will this riser feed the casting, how much metal must I pour including riser and gating, what choke area gives my pour time, and is the ladle big enough?
Open toolCasting Solidification Time and Riser Check
Will this cylindrical riser solidify after the casting, and what pattern size allows for shrinkage?
Open toolCoating Job Estimate (Coats, Material, Thinner, Labour, Film)
How much coating, thinner and labour does this paint or powder job take for all its coats, what does it cost per square metre, and is the wet film within the sag limit?
Open toolDeep Drawing and Ironing Punch Force
What punch force does this drawing or ironing operation need?
Open toolDeep Drawing Plan (Blank, Draws, Forces and Press)
What blank does this drawn cup need, how many draws will it take, and what punch and blank-holder forces must the press supply?
Open toolDeep Drawing Reduction Sequence
How many draws does this shell need, and what diameter should each draw produce?
Open toolDrawn Shell Blank Diameter and Draws
What blank diameter is needed for this drawn cup, and how many draws will it take?
Open toolFillet Weld Cost per Metre
What does this fillet weld cost per metre in labour, filler and gas?
Open toolFillet Weld Joint Design and Cost
What fillet weld size does this joint need, and what will the weld metal, time and cost be?
Open toolFillet Weld Quantity
How much deposited metal and consumable does this fillet require?
Open toolFillet Weld Strength
Can these fillet welds carry the load, and what leg size is needed?
Open toolGuillotine Shear Check (Cutting Force, Energy, Power, Thickest Sheet)
Can this guillotine shear cut my sheet: what force and energy does each cut take, does the motor keep up at my stroke rate, and what is the thickest sheet it can cut in this material?
Open toolGuillotine Shearing Force
What force does it take to shear this sheet or plate, and can the shear do it?
Open toolHopper and Bin Design (Capacity, Wall Angle, Plate Mass)
How much material will this round bin with a conical hopper hold, is the cone steep enough for the material to flow, and what will the shell plate weigh?
Open toolLap Joint Overlap (Brazed, Soldered or Bonded)
How much overlap does this brazed, soldered or bonded lap joint need?
Open toolLength of Angle or Bar Bent to a Ring
What length of angle iron or bar do I cut to roll this ring inside or outside a tank?
Open toolMechanical (Crank) Press Capacity Above Bottom
How much force can this crank press deliver at the height where my operation happens, and is it enough?
Open toolMinimum and Maximum Bend Radius
What is the smallest bend radius this sheet takes without cracking, and the largest that still forms permanently?
Open toolOval Tank Capacity and Weight (Elliptical Section, Shell Plate, Full Mass)
How much does this oval (elliptical) tank hold, how much plate does it take, and what will it weigh full?
Open toolPaint and Powder Coating Coverage
How much paint or powder is needed to coat this area at the specified film thickness?
Open toolPattern Size for Shrinkage and Casting Weight from Pattern
How big must the pattern be to give this casting size, and roughly what will the casting weigh?
Open toolPerforated Plate Design (Hole Size for Open Area, Punching Force, Ligament)
What hole size gives my target open area at this pitch, what force does a gang of punches need, and is the ligament between holes wide enough for the sheet?
Open toolPerforated Sheet Open Area and Hole Count
What open area, hole count and weight does a perforated sheet with this hole and pitch have?
Open toolPress Brake Bending Force
What tonnage does this V-die bend need, and is the press brake big enough?
Open toolPress Brake Set-up: Die, Radius, Flange and Tonnage
Which V-die should I use for this bend, what inside radius and minimum flange will it give, and is the press brake big enough?
Open toolPress Tonnage for a Compound or Progressive Die
What total press force does this die need for blanking, piercing, bending and drawing together, and is the press big enough?
Open toolPunching Force Estimate
What ideal force follows from the total cut perimeter?
Open toolPunching Operation Plan (Force, Stripping, Punch Stress, Clearance)
What force does this punching operation need with stripping, is the punch strong enough, what die clearance should I use, and is the press big enough?
Open toolRolled Plate Plan (Roll-To Radius for Springback, Blank Length, Radius Inspection)
To what radius must I roll this plate so it springs back to the radius I want, how long is the blank, and does my roll-gauge measurement show the radius is within tolerance?
Open toolSegmented Flange Ring Plan (Segment Size, Plate Fit, Yield, Welds)
If I make this large flange ring from segments cut out of plate, how big is each segment’s rectangle, will it fit my plate, and how much plate is wasted?
Open toolShear Spinning Blank Thickness and Force
How thick must the blank be for this shear-spun cone, and what force and power does the roller need?
Open toolShear Spun Cone Plan (Blank, Reduction, Roller Force, Power, Time)
What blank do I need to shear spin this cone, is the thickness reduction within what the material will take, and is the lathe powerful enough?
Open toolShearing Force for Parallel and Inclined Blades
What force does it take to shear this sheet or bar, with parallel or inclined (rake) blades?
Open toolSheet Bend Allowance and Deduction
What developed length follows from this bend and K-factor?
Open toolSheet Metal Bending Springback
How much will this bend spring back, and how far must it be overbent?
Open toolSheet-Metal Bracket: Flat Blank, Nesting, Bending Force and Cost
What flat blank, sheet yield, bending force and cost per part does this bent sheet-metal bracket have?
Open toolSheet-Metal Flat Pattern (Up to Four Bends)
What flat blank length gives this formed part with up to four bends, and are the flanges and bend radius workable on the press brake?
Open toolThree-Size Stock Cut Planner
How can these pieces fit into equal-length stock bars?
Open toolTube Bend Developed Length
What centreline length follows from these straights and bends?
Open toolTube Bending Plan (Length, Wall Thinning, Strain and Overbend)
How long a tube do I cut for this bent part, how thin will the outside wall get, is the bend radius tight enough to crack the tube, and how far do I overbend?
Open toolTube Bending Wall Thinning
How much will the tube wall thin on the outside of this bend, and thicken on the inside?
Open toolWeld Preheat and Cooling Time Check (CE, Heat Input, t8/5)
Does this steel need preheat for this thickness, and will my heat input and preheat give a cooling time in the range my procedure wants?
Open toolWelding Arc Energy and Heat Input
What energy per length follows from these arc parameters?
Open toolBottleneck and Line Balance
Which step is constraining the process?
Open toolCapacity Check
How much can you realistically produce?
Open toolCycle Time vs Takt
What cycle time do you need to meet demand?
Open toolOEE (quick)
How effectively is the equipment being used?
Open toolOEE and Downtime Analysis
How effectively is this production asset being used?
Open toolShift Output
How much should one shift realistically produce?
Open toolStaffing Need
How many people are required for this workload?
Open toolTakt Time
What pace must the process achieve?
Open toolDays of Stock Cover
How many days of stock do you have?
Open toolEconomic Order Quantity (EOQ)
What order quantity balances ordering and holding cost?
Open toolInventory Carrying Cost
What does holding this inventory cost each year?
Open toolReorder Point
When should you reorder?
Open toolSafety Stock
How much buffer stock should you hold?
Open toolMachinery & Power Transmission
Gears, drives, fasteners and threads.
Ball Screw Critical Speed and Buckling
Is this ball screw below its critical speed and buckling load?
Open toolBall Screw Rating Life
How long will this ball screw last at its mean load and speed?
Open toolBall-Screw Axis Stiffness, Preload and Axial Frequency
How stiff is this ball-screw axis, how far will it deflect under load, is the nut preload right, and what is the axial natural frequency?
Open toolBand Brake Stopping Design
Can this band brake stop the load in the time required, what lever force does it need, and how hot does it get?
Open toolBearing and Gear Losses with Circulating Oil Flow
How much heat do these bearings and gears make, and how much circulating oil carries it away?
Open toolBearing Fit and Operating Internal Clearance
How much radial internal clearance will this bearing have once it is pressed on and running warm, and could it go into preload?
Open toolBelt Conveyor Drive Sizing
What belt pull and motor power does this belt conveyor need, and will the drive pulley grip without slipping?
Open toolBelt Drive Tensions and Shaft Load
What belt tensions and shaft load are needed to transmit this power without slipping?
Open toolCaliper Disc Brake Design (Clamp Force, Pad Pressure, Heat)
What clamp force does this caliper disc brake need to stop the inertia in time, is the pad pressure acceptable, and how hot does the disc get per stop?
Open toolChain Conveyor Pull and Drive Sizing
What chain pull, sprocket torque and motor power does this chain conveyor need, and is the chain strong enough?
Open toolChain Linear Speed
How fast does this roller chain run, and how much does its speed fluctuate?
Open toolCircular Shaft Torsion
What torsional stress and twist does this circular shaft develop?
Open toolCone Clutch Torque and Engaging Force
How much torque can this cone clutch carry, and what force engages it?
Open toolCrossed Belt and Three-Pulley Belt Length
How long is the belt for this crossed drive or for a belt around three pulleys?
Open toolCrossed Flat Belt Drive Check (Length, Wrap, Tensions, Speed)
For this crossed (reversing) flat belt drive, how long is the belt, how much wrap does it get, and what tight-side tension does it need to carry the power without slipping?
Open toolFan Duty, Fan Laws and Belt Drive
What power does this fan need, how fast must it run for more air, and what pulleys and motor does that take?
Open toolFlange Coupling Bolt Capacity
Can the bolts of this flanged coupling carry the torque in shear?
Open toolFlange Coupling Design (Design Torque, Bolts, Friction Drive, Key)
Is this rigid flange coupling strong enough for the motor power, do the bolts carry the torque by friction or shear, and is the hub key long enough?
Open toolFlat Belt Drive Design (Wrap, Tensions and Belt Width)
What belt length and wrap does this flat belt drive have, what are the belt tensions, and how wide must the belt be for its allowable stress?
Open toolFlexible Coupling Selection (Torque, Speed, Misalignment, Bore and Key)
Is this flexible coupling right for the drive: torque with the service factor, peak torque, speed, combined misalignment, bore size and hub key?
Open toolFriction Clutch Engagement Design
What clamp force does this clutch need to start the load in time, and how much heat does each engagement make?
Open toolGear Ratio for Inertia Matching (Optimum Ratio and Motor Torque)
What gear ratio lets this motor accelerate the load with the least torque, what ratio can I actually use within the motor speed, and does the motor have the torque at my chosen ratio?
Open toolGearbox Oil Temperature and Grade Check (Heat Balance, Viscosity Hot)
At what temperature will my gearbox oil settle, does it need a cooler, and is the oil grade still thick enough at that temperature?
Open toolGearbox or Hydraulic Unit Heat Balance and Cooling
How hot will this gearbox or hydraulic power unit run, and does it need a cooler?
Open toolGearbox Selection Check (Service Factor, Thermal and Torque)
Is this catalogue gearbox right for my motor and load once the service factor and thermal rating are applied?
Open toolHoist Drive Sizing (Rope, Drum, Gearbox, Motor and Brake)
What rope pull, drum speed, gear ratio, motor and brake does this hoist need?
Open toolHydrodynamic Journal Bearing Design (Load, Friction, Heat and Oil)
Is this plain journal bearing within its unit load, how much heat does oil friction make, and how much oil must flow to carry it away?
Open toolInduction Motor Load Assessment (Current, Slip, Load, Energy)
From the nameplate and a measured speed, how heavily loaded is this induction motor, what current and torque is it running at, and what does it cost to run?
Open toolInduction Motor Synchronous Speed, Slip and Load
What is this motor’s synchronous speed and slip, and roughly how loaded is it?
Open toolInvolute Spline Stresses and Torque Capacity
Are the shear and compressive stresses in this involute spline within the allowables for the torque?
Open toolKeyed Shaft and Hub Design
How long must the key be to carry this drive, does the hub fit it, and is the keyed shaft strong enough?
Open toolKeyseat Depth and Measurement over Key
What depths should be measured when cutting this keyseat in a round shaft?
Open toolLead Screw Input Torque
What torque is needed to drive this axial load through a lead screw?
Open toolLead Screw Travel Speed
How fast does the nut travel at this screw speed?
Open toolLinear Guide Selection (Carriage Loads, Life and Static Safety)
What load does the most heavily loaded carriage of this linear guide carry, including the offset and acceleration, and how long will the guide last?
Open toolMotor and Gearbox Selection
What gear ratio, motor rating and starting torque does this load need, and is the inertia match reasonable?
Open toolMotor Efficiency Test with a Prony Brake (Torque, Output, Efficiency)
From a brake load test, what torque and output does this motor give, what efficiency does that mean against the measured electrical input, and does it match the nameplate?
Open toolOpen Belt Drive Geometry
What speed, wrap and pitch length follow from this pulley layout?
Open toolOverhung (Radial) Load on a Gearbox or Motor Shaft
What radial load does this pulley, sprocket or gear put on the gearbox shaft, and is it within the allowable at its position?
Open toolParallel Key Shear and Crushing
Is this parallel key long enough for the torque in shear and crushing?
Open toolPlate Clutch and Disc Brake Torque
How much torque can this plate clutch or disc brake transmit?
Open toolPulley Speed Ratio
What speed will the driven pulley run at, ignoring belt slip?
Open toolRail Travel Drive Sizing (Crane, Trolley or Transfer Car)
What force and motor does this wheeled carriage need to travel and accelerate on rails, and will the driven wheels slip?
Open toolRatchet and Pawl Design (Pitch, Tooth Force, Bearing and Pin)
What pitch and diameter does this ratchet wheel need for the torque, what force does the pawl take, and are the tooth face and pawl pin strong enough?
Open toolRatchet Wheel Tooth Pitch
What tooth pitch and outside diameter does a ratchet wheel need to hold this turning moment?
Open toolReflected Inertia and Motor Acceleration Torque
What torque must the motor give to accelerate this load through the gearbox, and is the inertia ratio reasonable?
Open toolRMS Torque for a Motor Duty Cycle
What is the RMS torque of this duty cycle, and can the motor carry it continuously?
Open toolRoller Chain Drive Design
Will this roller chain and sprocket pair carry the power, how long is the chain, and how smooth will it run?
Open toolRoller Chain Length and Centre Distance
How many links does this roller chain drive need, and what centre distance results?
Open toolRolling Bearing Selection Check
Does this bearing give the life I need at the reliability I want, and is it safe statically and at speed?
Open toolRotor Run-Up Time (Inertia, Acceleration Time, Start Energy)
How long will this motor take to bring the rotor up to speed, how much heat goes into the motor rotor during the start, and is that within the motor’s limits?
Open toolServo or Motor Duty Cycle Check (Move Profile, RMS and Peak)
For this move profile, what torque does the motor need to accelerate, run and stop the load, and is it within the motor’s continuous and peak ratings?
Open toolSilent (Inverted-Tooth) Chain Sprocket Diameters
What pitch, outside, guide-groove and over-pin diameters does this silent chain sprocket have?
Open toolSilent Chain Drive Check (Sprocket Diameters, Chain Length, Speed, Wrap)
For this inverted-tooth (silent) chain drive, what are the sprocket diameters, how many links do I order, what centre distance results, and are the chain speed and wrap acceptable?
Open toolSpring-Applied Holding Brake Sizing (Stop Time, Energy and Holding)
Will this spring-applied brake stop and hold the load in time, and can it absorb the stopping energy at this number of stops per hour?
Open toolSpur Gear Pair Geometry
What nominal geometry and speed ratio follow from module and tooth counts?
Open toolThree-Phase Motor Power, Current and Torque
What current does this three-phase motor draw, or what power does a measured current mean?
Open toolTiming (Synchronous) Belt Length and Teeth
How many teeth does the timing belt need, and what centre distance results?
Open toolTiming Belt Drive Design (Length, Mesh and Belt Width)
What belt length and centre distance does this timing belt drive need, are enough teeth in mesh, and how wide must the belt be for the power?
Open toolTorque, Power and Speed
What shaft torque corresponds to this power and speed?
Open toolUniversal (Cardan) Joint Speed Variation
How much does the output speed of this universal joint vary over each revolution?
Open toolUniversal-Joint Drive (Single or Double Cardan: Speed, Torque, Inertia)
How much does the output speed of this Cardan shaft fluctuate, is a double-joint arrangement phased correctly, and what peak torque do the joints see?
Open toolV-Belt or Flat Belt Drive Design
How many belts does this drive need, how long are they, and what load do they put on the shafts?
Open toolCam Follower Peak Velocity and Acceleration
What peak velocity, acceleration and inertia force does this cam rise produce?
Open toolCam Pressure Angle
What is the maximum pressure angle for this cam rise, base circle and roller follower?
Open toolCrossed Helical Gear Drive Check (Proportions, Sliding Velocity, Forces)
For this pair of crossed helical gears on shafts at right angles, what are the diameters and centre distance, how fast do the teeth slide, and what forces act on the shafts?
Open toolCrossed Helical Gears (Shafts at Right Angles)
What diameters and centre distance does this crossed helical gear pair at 90° have?
Open toolGear Backlash at Operating Temperature
How much backlash will this gear pair have when the housing and gears warm up, and could it jam?
Open toolGear Chordal Thickness and Addendum
What chordal thickness and chordal addendum should a gear tooth caliper read?
Open toolGear Hobbing Cycle Time
How long does it take to hob this gear at the chosen hob speed and feed?
Open toolGear Hobbing Plan (Time, Hob Life and Cost per Gear)
How long does each gear take to hob, what share of hob sharpening and hob cost falls on each gear, and what does the batch cost?
Open toolGear Pair for a Given Centre Distance (Profile Shift, Tips, Contact Ratio)
What profile shifts make this spur gear pair fit my centre distance, what tip diameters does that give, and is the contact ratio and undercut acceptable?
Open toolGear Span (Base Tangent) Measurement
What should the span measurement over k teeth read for this spur or helical gear?
Open toolGear Tooth Bending Stress (AGMA Form)
What bending stress does this tangential load put on the gear tooth root, and is the safety factor enough?
Open toolGear Tooth Bending Stress (Lewis)
What bending stress does the tooth load cause at the tooth root, by the Lewis equation?
Open toolGear Tooth Caliper Setting for Backlash (Chordal Thickness Limits)
What chordal tooth thickness and depth setting should my gear tooth vernier use for the backlash I want, and does the measured tooth pass?
Open toolGear Tooth Forces
What tangential, radial and axial forces does this gear mesh put on the shafts?
Open toolGear Tooth Measurement for Backlash (Span and Over Pins)
What span measurement and measurement over pins should this gear show once the teeth are thinned for the backlash I want?
Open toolGear Train Ratio, Speed and Torque
What is the overall ratio, output speed and output torque of this gear train?
Open toolGear Train Tooth Number Planner
What tooth numbers give this reduction ratio in one or two stages, and how close can I get?
Open toolHelical Gear Milling Set-up (Lead, Change Gears, Cutter, Indexing)
How do I set up a universal milling machine to cut this helical gear: lead and change gears, table swivel, cutter number and index setting?
Open toolHelical Gear Pair Geometry
What diameters, centre distance and contact ratios does this helical gear pair have?
Open toolHelical Gear Set Design (Geometry, Forces and Bending)
What are the sizes, tooth forces and bearing thrust of this helical gear pair, and is the tooth bending stress within the allowable?
Open toolInch Spur Gear Pair Check (Diametral Pitch Proportions, Pinion Bending)
For this diametral-pitch spur gear pair, what are the pitch and outside diameters and centre distance, and is the pinion strong enough for the horsepower?
Open toolInternal Gear and Pinion Proportions
What diameters, centre distance and tooth thicknesses do this internal gear and pinion need, and do the tooth numbers interfere?
Open toolInternal Gear Drive Check (Proportions, Tooth Difference, Pinion Bending)
Will this pinion and internal gear mesh without interference, what are their proportions and centre distance, and is the pinion strong enough for the power?
Open toolInvolute Gear Cutter Number
Which involute gear milling cutter number should cut this spur, helical or bevel gear?
Open toolInvolute Spline Basic Dimensions (ANSI B92.1)
What are the basic diameters and space width of this involute spline?
Open toolPlanetary Gear Set Design (Ratio, Assembly, Forces and Bending)
Does this planetary gear set assemble with equally spaced planets, what ratio and torque does it give, and are the sun teeth within their bending allowable?
Open toolPlanetary Gear Train
What ratio, output speed and torque does this planetary (epicyclic) gear set give?
Open toolPlastic Gear Drive Check (Power Rating and Backlash at Temperature)
Will this plastic gear carry the power, and will the mesh still have backlash when the gears warm up and absorb moisture inside a metal housing?
Open toolPlastics Gear Power Rating
How much power can this nylon, acetal or other plastics gear transmit?
Open toolProfile Shift and Working Centre Distance
What working centre distance and pressure angle result from these profile shifts, and are the teeth undercut?
Open toolRack and Pinion Speed, Force and Travel
What linear speed, force and travel does this rack and pinion give?
Open toolRoller Chain Sprocket Diameters
What are the pitch, outside, bottom and caliper diameters of this sprocket?
Open toolSpline Joint Design (Engagement Length and Stresses)
How long must this involute spline engage to carry the torque, and are the shaft and teeth within their allowable stresses?
Open toolSpur and Helical Gear Contact (Pitting) Stress
What contact stress does this gear mesh run at, compared with the allowable for the material?
Open toolSpur Gear Contact Diameters, Contact Ratio and LPSTC
Where does contact start on each gear, what is the contact ratio, and where is the lowest point of single tooth contact?
Open toolSpur Gear Contact Ratio
What transverse contact ratio does this spur gear pair have?
Open toolSpur Gear Dimensions (Diametral Pitch)
What are the diameters, tooth depth and centre distance of this inch (diametral pitch) spur gear pair?
Open toolSpur Gear Measurement over Pins
What should the measurement over two pins read for this external spur gear?
Open toolSpur Gear Mesh Interference Check (Contact Start Diameters and Contact Ratio)
Does contact on each gear of this spur pair start above its true involute form diameter, so there is no interference, and is the contact ratio enough?
Open toolSpur Gear Milling Set-up (Indexing, Cutter Number, Depth, Tooth Check)
How do I set up a dividing head and form cutter to mill this spur gear: index setting, cutter number, blank size, depth of cut and the chordal tooth check?
Open toolSpur Gear Pitting Resistance Power Rating (AGMA)
How much power can this spur gear pair transmit before pitting governs?
Open toolSpur Gear Set Design Check
Will this spur gear set carry the power for bending and pitting, and what face width does it really need?
Open toolStraight Bevel Gear Geometry
What pitch angles, cone distance and diameters does this bevel gear pair have?
Open toolStraight Bevel Gear Set Design (Geometry, Forces and Bending)
What are the cone angles, tooth forces and bearing loads of this straight bevel gear pair, and is the bending stress within the allowable?
Open toolWorm Gear Drive Design (Efficiency, Forces and Heat)
What torque and forces does this worm drive deliver, how much heat does it make, will the housing stay cool enough, and is it self-locking?
Open toolWorm Gear Geometry and Efficiency
What ratio, lead angle, centre distance and efficiency does this worm drive have, and will it back-drive?
Open toolBolt and Pin Shear and Bearing
Are these bolts or pins strong enough in shear and bearing for this load?
Open toolBolt Pattern Hole Plan (Layout, Clearance Holes, Position Tolerance)
For this bolt circle, where do the holes go, are the ligaments, edge distances and wrench clearance enough with the holes at their largest size, and what position tolerance can I allow on the holes?
Open toolBolt Preload Verification from Measured Stretch (and Nut Factor)
From the bolt stretch I measured, what preload did this bolt actually get, how close is it to the target, and what nut factor does the tightening torque imply?
Open toolBolt Stretch and Turn-of-Nut Angle
How much will this bolt stretch at the target preload, and how far must the nut turn from snug?
Open toolBolt Tightening Torque and Preload
What preload does this torque give, or what torque gives the target preload?
Open toolBolted Joint at Temperature (Preload Change from Differential Expansion)
How much does this bolt’s preload rise or fall when the joint heats up or cools down, and does it stay between the clamp needed and the proof load?
Open toolBolted Joint Design Check (Preload, Separation, Proof and Fatigue)
Does this bolt size and tightening torque keep the joint closed and the bolt safe under the working load?
Open toolBolted Joint Fatigue Check
Will the bolt in this preloaded joint survive the fluctuating external load?
Open toolBolted Joint Load Sharing and Separation
How much of the external load reaches the bolt, and when will the joint separate?
Open toolBracket Bolts in Tension and Shear (Moment on a Bolted Flange)
What tension do the top bolts of this bracket see from the overhanging load, what shear does each bolt carry, and do they pass a combined tension–shear check?
Open toolClevis Pin Joint Design (Pin Bending, Shear, Bearing and Eye)
Is this clevis (fork-and-eye) pin joint strong enough: pin bending and shear, bearing in the eye and fork, and tear-out of the eye?
Open toolEccentrically Loaded Bolt Group
Which bolt in this group carries the most shear when the load is offset?
Open toolFriction-Grip (Slip-Resistant) Bolted Joint
Will this preloaded bolted joint carry the shear load by friction without slipping, what tightening torque does that need, and what happens if it does slip?
Open toolGasketed Flange Bolt Load Check
Do these flange bolts give enough load to seat the gasket and hold the pressure, and what torque do they need?
Open toolPivot Pin and Retaining Ring Check (Clevis Stresses and Axial Retention)
Is this clevis pivot pin strong enough for the load, and will the retaining ring that holds it in take the axial push without failing?
Open toolRetaining Ring Thrust Capacity and Groove Edge Margin
What thrust load can this retaining ring and groove carry, and how far from the end must the groove be?
Open toolRiveted Joint Design (Balanced Pitch and Rivet Count)
What rivet pitch balances plate and rivet strength, how efficient is the joint, and how many rivets carry the load?
Open toolRiveted Lap Joint Efficiency
How strong is this riveted joint compared with the solid plate, and how will it fail?
Open toolSet-Screw Holding Power and Torque
How much power and torque can set screws hold on this shaft, and how many do I need?
Open toolSet-Screw Hub Retention (Torque, Axial Hold, Screws Needed)
Will set screws hold this hub on its shaft for the power and axial load, how many are needed, and when should I use a key instead?
Open toolTap Drill for Percentage of Thread
What drill size gives the required percentage of thread for a cutting or forming tap?
Open toolTaper Pin for Torque Transmission
What mean diameter of taper pin through this shaft and hub transmits the torque safely?
Open toolTapped Hole Design (Drill, Engagement and Depth)
What drill, length of engagement and tapping depth does this tapped hole need so the thread does not strip?
Open toolThread Length of Engagement
How long must the thread engagement be so the bolt breaks before the threads strip?
Open toolTurn-of-Nut Angle for Bolt Preload
Through what angle must the nut turn to reach this preload, or what preload does a given turn give?
Open toolWorking Strength of Bolts in Packed (Gasketed) Joints
What external load can this bolt safely carry in a packed joint after allowing for the tightening load?
Open toolAcme and Trapezoidal Thread Dimensions
What are the basic dimensions of this Acme or metric trapezoidal thread?
Open toolAcme Thread Tap Drill Size
What drilled hole size suits tapping this Acme thread?
Open toolAngular Indexing on a Dividing Head
What crank movement turns the work through this angle on a dividing head?
Open toolANSI Buttress Thread Basic Dimensions (7°/45°)
What are the basic dimensions of this 7°/45° buttress thread?
Open toolChange Gears for Thread Cutting
Which change gears cut this thread lead on this lathe?
Open toolDifferential Indexing on a Dividing Head
How can this number of divisions be indexed when simple indexing cannot do it?
Open toolHelical Milling Lead and Change Gears
What lead does this helix have, and which change gears cut it on the dividing head?
Open toolISO Metric Thread Basic Dimensions
What are the basic pitch, minor and root diameters and stress area of this metric thread?
Open toolISO Metric Thread Limits of Size (6g, 6H and Others)
What are the limits of size for this metric thread in the chosen tolerance class?
Open toolLathe Threading Plan (Infeed per Pass, Spindle Speed and Time)
How should I split the thread depth into passes, what spindle speed can I use for this pitch, and how long will the thread take to cut?
Open toolNPT Pipe Thread Gauge Dimensions
What are the pitch diameters and effective thread length of this NPT taper pipe thread?
Open toolNPT Tapped Port Check (Thread Length, Depth, Boss Wall)
Is this tapped NPT pipe port deep enough for a full thread engagement, and is the boss wall around it thick enough?
Open toolSimple Indexing on a Dividing Head
How many crank turns and holes give this number of divisions on a dividing head?
Open toolTapping Plan (Tap Drill, Thread Percentage, Speed and Cycle Time)
What tap drill gives the thread percentage I want, what percentage will the drill I have give, and how long does a batch of tapped holes take?
Open toolThread Helix Angle and Screw Efficiency
What is the helix angle of this thread, how efficient is it, and will it self-lock?
Open toolThread Pitch Diameter by Three Wires (Accept or Reject)
Given my reading over three wires, what is the thread’s pitch diameter, and is it within the drawing limits?
Open toolThread Rolling Set-up (Blank Diameter, Roll Size, Starts)
For rolling this metric thread with cylindrical dies, what blank diameter do I turn, how many starts must the rolls have to fit my machine, and what roll pitch diameter results?
Open toolThread Turning Infeed per Pass
How deep should each pass be when single-point turning this thread?
Open toolThreading Roll Pitch Diameter
What pitch diameter should a single- or multiple-start threading roll have for this screw thread?
Open toolThree-Wire Measurement of Taper and Buttress Threads
What should the measurement over three wires be for this taper or buttress thread, and what pitch diameter does a reading give?
Open toolThree-Wire Measurement with Lead Angle (Buckingham)
What should the measurement over wires read for this coarse-lead or multi-start thread or worm?
Open toolThree-Wire Thread Measurement
What should the measurement over three wires read for this thread, or what pitch diameter does a reading give?
Open toolUnified Inch Thread Basic Dimensions
What are the basic pitch and minor diameters and stress area of this UNC or UNF thread?
Open toolUnified Thread Limits of Size (Classes 1A–3B)
What are the limits of size for this UNC, UNF or UN thread in the chosen class?
Open toolWhitworth Thread Basic Dimensions
What are the basic pitch and minor diameters of this BSW, BSF or BSP (parallel) Whitworth thread?
Open toolHydraulics & Pneumatics
Fluid power circuits, cylinders, pumps and compressed air.
Accumulator Circuit Sizing (Pump Deficit, Gas Volume, Recharge)
Does this cylinder stroke need an accumulator to reach its speed, how big must it be, and can the pump recharge it before the next stroke?
Open toolBuoyancy and Submerged Weight
Will this body float, and how much does it weigh when submerged?
Open toolBuried or Submerged Tank Flotation Check (Uplift and Ballast)
Will this empty tank float out of the ground when the water table rises, and how much concrete ballast holds it down?
Open toolControl Valve Sizing (Kv, Opening, Authority, Full-Open Flow)
What Kv does this control valve need, how far open will the chosen valve run, does it have enough authority over the system, and what flow does it pass wide open?
Open toolCoolant Flow for a Heat Load
What flow of water or oil removes this heat load for the allowed temperature rise?
Open toolCylinder Meter-Out Speed Control (Orifice, Intensification, Heat)
What meter-out orifice sets this cylinder to the speed I want under its load, how high does the rod-side pressure rise, and how much heat does the control make?
Open toolDarcy Pipe Pressure Drop
How much pressure is lost to friction along this straight pipe?
Open toolHeat Exchanger LMTD and Area
What log mean temperature difference and area does this heat exchanger need for the duty?
Open toolHeat Exchanger Sizing (Duty, Outlet Temperature and Area)
How much heat does this exchanger move, what will the cold stream leave at, and is the installed area enough?
Open toolHydraulic Accumulator Size
What gas-charged accumulator size delivers this volume between the working pressures?
Open toolHydraulic Cylinder Force and Speed
What ideal force and stroke time follow from pressure and flow?
Open toolHydraulic Cylinder Sizing (Bore, Rod Buckling, Flow, Power, Pipes)
What bore and rod does this cylinder need, how much flow and power does it take, and what pipe size suits it?
Open toolHydraulic Cylinder Structure (Barrel, End Cap and Rod Buckling)
Is this hydraulic cylinder’s barrel thick enough, will the end cap hold the pressure, and will the rod buckle when it pushes fully extended?
Open toolHydraulic Line Sizing (Velocity, Pressure Drop and Tube Rating)
Is this tube big enough for the flow, how much pressure does the line lose, and is the tube rated for the system pressure?
Open toolHydraulic Motor Drive Sizing
What motor displacement, flow and pump power does this hydraulic drive need for the load torque and speed?
Open toolHydraulic Motor Torque, Speed and Power
What torque, speed and power will this hydraulic motor give for this flow and pressure?
Open toolHydraulic Orifice Restrictor Design (Drill Size, Flow, Heat)
What orifice size gives the flow I want at this pressure drop, what flow does the nearest drill size actually give, and how much heat does the restrictor put into the oil?
Open toolHydraulic Power and Pump Input
What fluid power and shaft input does this duty require?
Open toolHydraulic Power Unit Sizing (Pump, Motor, Reservoir, Cooling)
What pump displacement and motor power does this hydraulic power unit need, how big should the reservoir be, and does it need a cooler?
Open toolHydrostatic Pressure and Tank Wall Force
What pressure and force does this liquid depth put on a tank wall and floor?
Open toolLiquid Pipe Velocity and Reynolds Number
What velocity and flow regime follow from diameter, flow and viscosity?
Open toolOrifice and Restrictor Flow
How much liquid flows through this orifice at this pressure drop, or what drop does a flow cause?
Open toolPipe Flow Velocity
What is the mean velocity of this flow in a pipe of this bore?
Open toolPipe Friction Factor and Pressure Drop
What friction factor and pressure drop does this flow have in this pipe?
Open toolPipe or Hose Size for a Target Velocity
What inside diameter keeps this flow at the target velocity?
Open toolPipe Run Thermal Expansion Check (Growth, Loop Leg, Anchor Force)
How much will this hot pipe run grow, is the expansion loop or bend leg I have room for long enough, and what force will it put on the anchors?
Open toolPipe Thermal Expansion, Anchor Force and Expansion Loop
How much will this pipe run grow when hot, what force would fully restrained anchors see, and how long must the loop legs be?
Open toolPontoon Float Check (Draft, Freeboard, Reserve Buoyancy)
How deep will this raft of cylindrical drums float with its load, how much freeboard is left, and how much reserve buoyancy is there?
Open toolPump and Fan Affinity Laws
What flow, head and power will this centrifugal pump or fan give at a new speed or impeller size?
Open toolPump NPSH Available
Is the net positive suction head available enough to prevent cavitation?
Open toolPump Operating Point on the System Curve
Where will this centrifugal pump actually run on my system, how efficiently, and what speed gives the flow I want?
Open toolPump Shaft Power
What shaft power does a pump need for this flow and head?
Open toolPump Speed Control Plan (Speed for Target Flow, Power, Saving over Throttling)
What speed must my pump run at to deliver the flow I need, how much power does that take, and how much does speed control save compared with throttling a valve at full speed?
Open toolPump Suction Line Check (Friction Loss, NPSH Available, Lowest Liquid Level)
Will my pump cavitate with this suction line, how low can the liquid level fall before it does, and is the suction velocity reasonable?
Open toolPumping System Design (Head, Power and NPSH)
What head and power does this pumping duty need, and will the pump have enough suction head?
Open toolSump or Pit Pump-Out Plan (Simpson Section Area, Volume, Time)
How much water is in this pit or sump of irregular cross-section, and how long will my pump take to empty it with water still running in?
Open toolTank Heating or Cooling Coil Plan (Area, Tube Length, Turns, Pressure Drop)
How many turns of tube does my tank heating or cooling coil need for the duty, how long is the tube, and what pressure drop will the water see through it?
Open toolValve Closure Surge (Water Hammer against Pipe Rating)
How big a pressure surge does closing this valve cause, does working pressure plus surge stay within the pipe rating, and how slowly must the valve close to keep it there?
Open toolValve Flow Coefficient (Kv and Cv)
What Kv does this valve need for the flow and pressure drop, or what flow will a valve pass?
Open toolWater Hammer Pressure Surge
How big a pressure surge will closing this valve cause?
Open toolWater Supply Line Check (Velocity, Friction Loss, Outlet Pressure, Valve Surge)
Is this water line big enough: is the velocity reasonable, what pressure is left at the outlet after friction and lift, and will a quick-closing valve push the pressure past the pipe rating?
Open toolAir Compressor Power
What shaft power does it take to compress this air flow to this pressure?
Open toolAir Compressor Staging Check (Power and Discharge Temperature)
Should this air compressor be single- or two-stage: how much power does each take, what discharge temperature does each reach, and does the chosen arrangement stay within the temperature limit?
Open toolAir Receiver Size
What receiver volume covers this demand above compressor supply for this time and pressure band?
Open toolClosed Gas Vessel Temperature Check (Pressure Rise, Contents, Fill Limit)
If this closed gas vessel or cylinder heats up, how high does its pressure rise, is it within the rating, and what is the highest pressure I can fill it to?
Open toolCompressed Air Leak Cost
How much air does this leak waste, and what does it cost each year?
Open toolCompressed Air Pipe Pressure Drop
What pressure drop does this compressed air flow cause in this pipe?
Open toolCompressed-Air Blow-Off Consumption (Nozzles, Air, Power and Cost)
How much compressed air do these blow-off nozzles or open pipes use, what share of the compressor is that, and what does it cost each year?
Open toolCompressed-Air Leak Audit (Leak Flow, Power, Cost and Repair Payback)
How much air and money are these compressed-air leaks wasting, what share of the compressor do they use, and how quickly do repairs pay back?
Open toolCompressed-Air Main Sizing (Bore, Pressure Drop, Velocity, Receiver)
What is the smallest standard pipe bore for this compressed-air main within my pressure-drop and velocity limits, and how big a receiver covers the peak demand?
Open toolCompressed-Air System Sizing
How big a compressor, receiver and main pipe does this plant need, and what do the leaks cost?
Open toolGas Compression and Expansion Process
What final volume, temperature and work result from compressing or expanding this gas?
Open toolGas Volume at Pressure and Temperature
What volume does this gas occupy at the new pressure and temperature?
Open toolPneumatic Cylinder Air Demand
What reference-volume air demand does this cylinder cycle create?
Open toolPneumatic Cylinder Force and Bore Selection
What force does this air cylinder give, and is the bore large enough for the load?
Open toolPneumatic Cylinder Sizing, Air Use and Running Cost
What bore does this air cylinder need, how much air does it use, and what does that air cost?
Open toolPneumatic Cylinder Swept Volume
What volume does a double-acting cylinder sweep in one complete cycle?
Open toolVacuum Cup Holding Force
Will these suction cups hold this part during handling?
Open toolVacuum Gripper Sizing (Cups, Diameter, Holding and Evacuation Time)
Will these suction cups hold the part through the move, what cup size or count would, and how quickly does the system pull down to working vacuum?
Open toolVelocity and Flow of Escaping Compressed Air
How fast and how much air escapes from this tank through a hole or nozzle?
Open toolQuality & Materials
Inspection, capability, tolerances and material behaviour.
Abbe Offset Error
How much error does an offset between the scale and the measured feature cause?
Open toolAcceptance Sampling Plan (n and c for Producer and Consumer Risk)
What sample size and acceptance number protect both me and my customer at these quality levels, and does my current plan do it?
Open toolAcceptance Sampling Probability (OC Curve)
What is the chance this sampling plan accepts a lot with a given defect rate?
Open toolArc Radius from Measurement over Rolls
What radius does this concave or convex gauge or part have, from a measurement over two rolls?
Open toolBolt Circle Inspection from Three Holes (Fitted Diameter, Centre Position)
From the measured centres of three holes on a bolt circle, what diameter and centre do they actually lie on, and are the circle size and its centre position within tolerance?
Open toolBolt Circle Measurement over Pins
What is the distance across opposite holes of this bolt circle, measured over plugs?
Open toolCNC Axis Positioning Accuracy and Repeatability
What positioning accuracy and repeatability does this axis have from repeated runs to target points?
Open toolCompound-Angle Sine Plate Set-up (True Angle and Stack Heights)
For a surface with two apparent slopes, what true compound angle and direction does it have, and what gauge-block stacks set a compound sine plate to it?
Open toolDovetail Inspection over Rods (Reading Limits, Accept or Reject)
What reading over (or between) rods should this dovetail give at its width limits, and does my measured reading pass?
Open toolDovetail Measurement over Rods
What should the measurement over (or between) rods read for this dovetail?
Open toolFastener Position Tolerance (Floating or Fixed) and Part Check
What position tolerance can I give the holes for these fasteners and clearance holes, and does a measured part pass with its bonus tolerance?
Open toolFixture Locating Error from Pin and Hole Clearances
How far can a part shift and rotate on its locating pins, and does that fit the feature tolerance?
Open toolGauge Block Stack Builder
Which gauge blocks make up this length with the fewest blocks?
Open toolGo and No-Go Gauge Sizes
What sizes should the go and no-go plug or ring gauges have for this toleranced feature?
Open toolGuard-Banded Acceptance Decision (Uncertainty Budget, Accept, Reject or Indeterminate)
Given my gauge’s measurement uncertainty, can I accept this part from its reading, must I reject it, or is it too close to the limit to decide?
Open toolIndependent Dimensional Uncertainty Budget
How do these independent measurement contributions combine?
Open toolInstrument Calibration Check (Errors, Accuracy Class, Interpolated Correction)
From my calibration readings against a reference, is this gauge within its accuracy class, and what is the corrected value of a reading taken in service?
Open toolInternal Taper Angle from Two Balls
What is the included angle and top diameter of this tapered bore, measured with two balls?
Open toolInternal Taper Inspection with Two Balls (Accept or Reject)
From my two-ball depth readings, what is this internal taper’s included angle and top diameter, and are they within the drawing limits?
Open toolISO Tolerance Grade (IT) Value
How large is the ISO IT tolerance grade for this nominal size?
Open toolLimit Gauge Plan (IT Tolerance, Go and No-Go Sizes, Makeability)
For this size and tolerance grade, what are the work limits, what go and no-go gauge sizes do I order, and is the gauge tolerance large enough to make?
Open toolLot Acceptance from Process Capability (Fraction Defective, Sampling Plan Risk)
Given how capable my process is, what fraction of parts fall outside tolerance, and how often will my customer’s sampling plan reject a lot?
Open toolMachine Axis Error Budget (Positioning, Abbe, Thermal, Fixture)
Can this machine axis hold my tolerance once positioning error, repeatability, Abbe error, thermal growth of the screw and fixture error are added up?
Open toolMeasurement Error from Part and Gauge Temperature
How far off is my measurement because the part and gauge are not at 20 °C, and what is the true size?
Open toolMeasurement Uncertainty Budget (Combined, Expanded, Test Ratio)
What is the total uncertainty of this length measurement, is it small enough against the tolerance, and what guard-banded limits should I accept to?
Open toolNormal Distribution Out-of-Tolerance
What fraction of parts will fall outside these limits for this mean and standard deviation?
Open toolProcess Capability Check (σ from R̄, Cp, Cpk, Rejects, Limits)
From my control chart averages, how capable is this process against the tolerance, what share will fall out of tolerance, and what are the control limits?
Open toolProcess Capability from Summary Data
What Cp and Cpk follow from this mean and within-process spread?
Open toolProcess Change Trial (Sample Size, Welch t-Test, Improvement Decision)
How many parts should I run before and after a process change to detect the improvement I care about, and do my trial results prove the change made a real difference?
Open toolSample Size to Estimate a Mean
How many measurements or tests are needed to estimate the mean within this margin?
Open toolSine Bar Height
What height difference sets this angle?
Open toolSine-Bar Set-up (Stack Height, Rounding and Angle Error)
What gauge-block stack sets this sine bar to the angle, how much angle error do block rounding and tolerance add, and is it within my angle tolerance?
Open toolStatistical (RSS) Tolerance Stack
Will this gap stay within its limits, worst case and statistically?
Open toolTaper and Angle Gauges with Discs
What angle or taper do these two discs set, or where must they be placed for a required taper?
Open toolTolerance Stack Design (Worst Case, RSS and Predicted Rejects)
Will this assembly gap stay within its limits by worst case, by root-sum-square, and what share of assemblies will fall outside at my process capability?
Open toolTrue Position with Bonus Tolerance
Is this hole or pin within its positional tolerance, including any bonus from its size?
Open toolTwo-Sample Comparison (t-test)
Is the difference between these two averages statistically significant?
Open toolV-Groove Measurement over a Pin
How far should a gauge pin stand above the surface in this V-groove?
Open toolX-bar and R Control Chart Limits
What are the control limits for this X-bar and R chart?
Open toolASTM Grain Size Number
What ASTM grain size number does this count or intercept measurement give?
Open toolBrinell Hardness from Indentation
What Brinell hardness does this indentation give, and is the test valid?
Open toolBrinell Hardness Test Check (Hardness, Validity Rules, Specification)
What Brinell hardness does this indentation give, was the test valid for the specimen thickness, edge distance and spacing, and is the result within specification?
Open toolCantilever Snap-Fit Design (Plastics)
Will this snap-fit finger survive assembly, and what forces does it need?
Open toolCorrosion Rate from Mass Loss
How fast is this metal corroding, and how long will the corrosion allowance last?
Open toolCorrosion Remaining Life and Inspection Interval
At its measured corrosion rate, how long before this pipe or vessel wall reaches its minimum thickness, and when should it next be inspected?
Open toolDifferential Thermal Expansion
How does a fit clearance change when the bore and shaft materials expand differently?
Open toolDifferential Thermal Fit
How does clearance change at different part temperatures?
Open toolElastic Constants: E, G, ν and Bulk Modulus
What are the other elastic constants of an isotropic material from the two I know?
Open toolElectric Tank Heater Sizing (Heat-up, Losses and Watt Density)
How much heater power will bring this tank up to temperature in time, and is the installed heater’s surface loading safe for the liquid?
Open toolEnergy and Time to Melt Metal
How much energy and time does it take to melt and superheat this charge of metal?
Open toolEquivalent Thickness for Equal Stiffness or Strength
How thick must a part in the new material be to match the stiffness and strength of the original?
Open toolFurnace Wall Design (Layers, Convection and Radiation from the Surface)
What outside surface temperature and heat loss will this layered furnace wall have, are the layer interfaces within their service temperatures, and what does the loss cost?
Open toolHeat Flow Through a Layered Wall
How much heat flows through this insulated wall, and what are the layer temperatures?
Open toolHeat Loss from an Insulated Pipe
How much heat does this insulated pipe lose, and how hot is the outside surface?
Open toolHeat-Treatment Furnace Load Plan (Time, Energy, Cost)
How long will this load take to heat, how much energy will the cycle use, and what does it cost per kilogram?
Open toolHeating Energy and Time
How much energy and time does it take to heat this material or liquid?
Open toolHot Surface Insulation Check (Bare Loss, Insulated Loss, Touch Temperature, Payback)
How much heat does this hot surface lose bare and with insulation, is the insulated surface safe to touch, and how quickly does the insulation pay for itself?
Open toolLinear Thermal Growth
How much does an unrestrained dimension change with temperature?
Open toolLumber Board Feet and Volume
How many board feet and cubic metres are in this timber order, and what does it cost?
Open toolMelt Charge Blend (Two Materials to a Target Content, Batch Masses, Cost)
How much of each of my two charge materials do I melt to hit the target alloy content, what do I weigh out for the batch, and what does the charge cost per kilogram?
Open toolMelting Furnace Batch Plan (Energy, Melt Time, Melts per Shift, Cost)
How long does each melt take in this furnace, how many melts and how much metal can I get per shift, and what does the energy cost per kilogram?
Open toolMixture Cost and Blending (Alligation)
What does this mixture cost per kilogram, or in what proportions do two ingredients blend to a target value?
Open toolPipe Insulation Design (Thickness for Surface Temperature and Loss, Payback)
How thick must the insulation on this hot pipe be to keep the surface safe and the heat loss within target, and how quickly does it pay back?
Open toolRadiant Heat Loss
How much heat does this hot surface radiate to its surroundings?
Open toolRing Blank Plan (Rolled Ring or Cut from Plate, Mass and Cost)
For this machined ring, is it cheaper to buy a rolled (forged) ring blank or to cut the blank from plate, and how much material does each waste?
Open toolSnap-Fit Joint Design (Deflection, Assembly and Retention Forces)
How far can this snap-fit finger deflect, how hard is it to push together, and how much force will hold it closed?
Open toolStock Volume and Mass
What is the theoretical mass of this stock geometry?
Open toolStockpile Haulage Plan (Pile Mass, Truck Loads, Loading Time, Ground Pressure)
How much material is in this stockpile, how many truck loads and loader passes will it take to move it, and is the ground under the pile strong enough?
Open toolStockpile Volume and Weight from Angle of Repose
How much material is in a natural pile on this circular or rectangular base?
Open toolTensile Test Evaluation (Yield, UTS, Elongation, Reduction of Area, True Fracture)
From my tensile test readings, what are the yield and tensile strengths, elongation, reduction of area, modulus and true fracture stress, and does the material meet its specification?
Open toolThermal Stress and Movement in Plastic–Metal Assemblies
What stress builds up in a plastic part restrained by metal when the temperature changes, and how much do they move relative to each other?
Open toolTimber Order Plan (Board Feet, Cost, Moisture, Weight, Deliveries)
How much timber do I order with a waste allowance, what will it cost, is it dry enough to use, and how heavy is the load to deliver?
Open toolTrue Stress, True Strain and Flow Curve
What are the nominal and true stress and strain at this point in a tensile test, and what does the flow curve predict?
Open toolVickers and Knoop Hardness from Indentation
What Vickers or Knoop hardness does this indentation give?
Open toolVickers Hardness Test Check (Hardness, Validity, Specification)
What Vickers hardness do these indentation diagonals give, was the test valid for the thickness, spacing and edge distance, and is the result within specification?
Open toolWood Moisture Content and Density
What is the moisture content of this timber, and what is its density at a given moisture content?
Open toolMaintenance & Reliability
Alignment, lubrication, oil cleanliness and asset life.
Coolant Blend
What volumes make the required final coolant concentration?
Open toolCoolant Concentration from Refractometer
What is the coolant concentration from this refractometer reading, and what should be added to correct it?
Open toolCoolant Tank Maintenance (Concentration, Correction, Make-Up Mix, Usage)
What is the coolant concentration from my refractometer reading, what do I add to correct it, what make-up mix keeps it on target, and how much concentrate will I use?
Open toolCoolant Top-up Balance
How much make-up fluid reaches the target within sump capacity?
Open toolFilter Beta Ratio and Capture Efficiency
What beta ratio and capture efficiency does this filter achieve, and what will pass downstream?
Open toolHydraulic Filter Selection (Beta Ratios, Cleanliness Code, Pressure Drop)
Will this filter bring the oil to my target cleanliness code, and is its pressure drop acceptable at my flow and oil viscosity?
Open toolISO 4406 Oil Cleanliness Code from Particle Counts
What ISO 4406 cleanliness code do these particle counts give, and does the oil meet its target?
Open toolJournal Bearing Oil Check (Viscosity at Temperature, Film and Friction)
At its running temperature, how thick is this oil, does the journal bearing keep a safe film with it, and how much heat does the oil friction make?
Open toolLubricant Film Thickness Ratio (Lambda)
Is the lubricant film thick enough to separate these rolling surfaces?
Open toolLubricant Viscosity Check (Operating and Cold-Start Viscosity)
Is this oil grade thick enough at the operating temperature and thin enough to circulate at a cold start?
Open toolPreventive Replacement Interval Plan (Weibull Reliability and Cost per Hour)
Should I replace this part on a schedule or run it to failure, what interval minimises cost, and what interval gives the reliability I want?
Open toolRepairable Asset Availability
What do operating and repair records show about availability?
Open toolRim and Face Shaft Alignment Corrections
How many shims should go under each foot of the movable machine to correct this misalignment?
Open toolShaft Alignment Plan (Rim and Face Corrections with Thermal Growth)
From my rim and face readings, how many shims do I add or remove at each foot so the shafts line up when the machines are hot, and is the running alignment within tolerance as it stands?
Open toolShaft Angular Offset
What angular misalignment does this offset across a known span represent?
Open toolSystem Reliability from Weibull Components (Series and Redundancy)
What is the chance this machine runs a mission without failure when its components wear out on Weibull curves, and does redundancy on one item get it to target?
Open toolThermal Growth for Hot Shaft Alignment
How much will each machine’s shaft rise when hot, and what cold offset should be set?
Open toolWeibull Reliability and B10 Life
What is the probability this component survives to a given time, and what are its B10 life and MTTF?
Open toolProjects & Improvement
Project health, planning, workload and improvement cases.
Business Case with NPV
Does this project make commercial sense?
Open toolContingency Allowance
How much project contingency is reasonable?
Open toolProject Health Check
How healthy is this project right now?
Open toolProject Size and Governance
How large and complex is this project?
Open toolResource Fit
Do you have enough people-hours to deliver?
Open toolSchedule Risk Check
Are you likely to hit the deadline?
Open toolAutomation Business Case
Is this repetitive work worth automating?
Open toolBefore and After Comparison
Did the change actually improve the process?
Open toolEight Wastes Check
Where is Lean waste most visible?
Open toolImprovement Value
What is this process improvement worth?
Open toolJig and Fixture Return on Investment
Is this jig or fixture worth building?
Open toolProcess Maturity Score
How mature is this process?
Open toolDeadline Feasibility
Can you finish this quantity by the deadline?
Open toolDemand vs Capacity
Can available capacity meet demand?
Open toolProduction Capacity Planner
Can the current production setup meet demand?
Open toolProfit What-if Scenario
What happens if volume, price or cost changes?
Open toolTeam Workload
Is the team overloaded?
Open toolBusiness & Commercial
Costing, quoting, investment and business decisions.
Benefit–Cost Ratio
Do the discounted benefits of this project exceed its discounted costs, and by how much?
Open toolBreak-even and Margin of Safety
How much must you sell before you break even?
Open toolDepreciation Schedule
How does this asset depreciate each year by straight-line, sum-of-years’-digits or declining balance?
Open toolEquipment Finance Plan (Loan Payment, Depreciation, Tax, Yearly Cash Flow)
If I borrow to buy this machine, does the saving it brings cover the loan payments each year once depreciation and tax are counted?
Open toolEquipment Investment Appraisal (NPV, IRR, Payback, B/C, EUAC)
Does buying this machine pay for itself: what are its net present value, rate of return, payback, benefit–cost ratio and equivalent annual cost?
Open toolEquivalent Annual Cost Comparison
Which of two machines or options has the lower equivalent uniform annual cost?
Open toolInterest and Equivalence Factors
What are the compound interest factors for this rate and period?
Open toolInternal Rate of Return (Uneven Cash Flows)
What rate of return does this investment earn with these yearly cash flows?
Open toolInvestment Hurdle Check
Does the investment clear a simple commercial hurdle?
Open toolLearning Curve Unit Time and Cost
How long will the nth unit take, and what will the batch cost, as the team learns?
Open toolLearning-Curve Quote (Batch Hours, Cost and Price per Unit)
With the learning curve, how many hours will this batch take, what does each unit cost, and does the price I am offered give my margin?
Open toolMachine Hour Rate
What does this machine cost per productive hour to own and run?
Open toolMachine Rate Quote Check (Hour Rate, Job Cost, Margin)
What does an hour on this machine really cost, what does this job cost per part at that rate, and does my quoted price give the margin I need?
Open toolMake or Buy (In-House Cost against a Supplier Price, Break-Even)
Is it cheaper to make this part in-house or buy it, at what quantity do the two cost the same, and how much does the right choice save at my volume?
Open toolMargin and Markup
What margin are you actually making?
Open toolProcess Selection Break-Even Quantity
Above what quantity does the process with higher set-up cost become cheaper?
Open toolRecurring Savings Check
What is this improvement worth over a year?
Open toolRepair or Replace (Defender and Challenger Equivalent Annual Cost)
Should I keep running this old machine, with its rising running costs, or replace it with a new one, comparing them as equivalent annual costs?
Open toolReturn on Investment and NPV
Is this investment financially worthwhile?
Open toolTrue Unit Cost
What does this work really cost?
Open toolJob Cost Estimate
What is the expected total cost of this job?
Open toolLabour Quote
What should the labour portion of the job cost?
Open toolManufacturing Quote Builder
What should this manufacturing job be quoted at?
Open toolMinimum Order Quantity Check
What does the supplier MOQ do to your inventory economics?
Open toolPrice from Target Margin
What should you charge for the target margin?
Open toolQuote Margin Check
Does this quote actually make commercial sense?
Open toolSupplier Comparison
Which supplier offers the stronger overall value?
Open toolChange Impact Assessment
How disruptive is this proposed change?
Open toolMake or Buy (detailed cost comparison)
Should you manufacture this internally or buy it from a supplier?
Open toolMake or Buy (quick check)
Should you make it yourself or outsource it?
Open toolProject Gate Review
Is this project worth proceeding with?
Open toolRisk Rating (5 × 5 matrix)
How serious is this risk?
Open toolTwo-Option Comparison
Which of two options gives the stronger overall outcome?
Open toolWork Priority Score
What should go first?
Open toolBuild or Buy Software
Should you build custom software or buy an existing product?
Open toolBuy or Lease
Should you buy or lease this equipment?
Open toolHire or Outsource
Should you hire or outsource this work?
Open toolProcess or Software Readiness
Should you fix the process first or buy software?
Open toolSubscription Value
Is this subscription earning its keep?
Open toolReference & Utilities
Unit conversion, geometry and engineering mathematics.
Angle Converter
What is this angle in other units?
Open toolDecimal to Fraction
What is the nearest fraction to this decimal, and how far off is it?
Open toolDegrees, Minutes and Seconds Converter
What is this angle in degrees–minutes–seconds, decimal degrees and radians?
Open toolDensity and Specific Gravity Converter
What is this density in other units, or as a specific gravity?
Open toolEnergy and Work Converter
What is this energy in other units?
Open toolForce Converter
What is this force in other units?
Open toolLength Converter
What is this length in other units?
Open toolMass Converter
What is this mass in other units?
Open toolOil Viscosity Unit Conversion (cSt, cP, SUS, Reyn)
What is this oil viscosity in centistokes, centipoise, Saybolt seconds and reyns?
Open toolPower Converter
What is this power in other units?
Open toolPressure and Stress Converter
What is this pressure or stress in other units?
Open toolSpeed and Feed Rate Converter
What is this speed in other units?
Open toolTemperature Converter
What is this temperature, or temperature difference, in other scales?
Open toolTorque Converter
What is this torque in other units?
Open toolVolumetric Flow Converter
What is this volumetric flow rate in other units?
Open toolWind Chill Temperature
How cold does it feel at this air temperature and wind speed?
Open toolArea of an Irregular Outline by Simpson’s Rule
What is the area of this irregular outline from measured heights at equal spacing?
Open toolBolt Circle Layout (Coordinates, Ligament, Edge and Wrench Clearance)
Where do the holes of this bolt circle go, is there enough metal between holes and to the edges, and will a socket fit between the bolts?
Open toolCentre of Gravity of Common Shapes
Where is the centre of gravity of this shape or solid?
Open toolCircle Through Three Points
What centre and radius pass through these three measured points?
Open toolCircular Segment and Arc
What chord, arc length, angle and area does this circular segment have?
Open toolCompound Angle
What true compound angle results from tilts in two perpendicular planes?
Open toolCylindrical and Spherical Coordinates
What are the rectangular, cylindrical or spherical coordinates of this point?
Open toolCylindrical Tank Contents
How much liquid is in this partly filled cylindrical tank?
Open toolDistance and Angle Between Two Points
How far apart are these two points, and at what angle?
Open toolEllipse Area and Perimeter
What area, perimeter and eccentricity does this ellipse have?
Open toolHelix (Coil) Developed Length
How long is the wire, tube or strip wound into this helix?
Open toolHopper and Frustum Volume
What volume and side area does this tapered hopper or frustum have?
Open toolHorizontal Tank Calibration Chart (Shell and Heads, Volume by Depth)
How much liquid is in this horizontal cylindrical tank with dished heads at my dip reading, what is the full capacity, and what does the depth chart look like?
Open toolLinear Interpolation
What value lies between these two table entries?
Open toolPlane Figure Area and Perimeter
What area and perimeter does this flat shape have?
Open toolPolar and Rectangular Coordinates
What are the X–Y coordinates of this radius and angle, or the radius and angle of this X–Y point?
Open toolPolygon Area and Centroid from Coordinates
What is the area, perimeter and centroid of this polygon from its corner coordinates?
Open toolPrismoidal Formula Volume
What is the volume of this prism, pyramid, frustum or earthwork from its end and middle sections?
Open toolRegular Polygon and Hexagon Sizes
What are the across-flats, across-corners, side and area of this regular polygon?
Open toolRollers Around a Shaft and Circles in Circles
What size rollers fit around this shaft, how big a circle holds N equal circles, or how many circles fit in a rectangle?
Open toolSpherical Triangle and Great-Circle Distance
What are the angles and area of this spherical triangle, or the great-circle distance between two points?
Open toolStraight Lines: Intersection, Angle and Distance
Where do these two lines cross, at what angle, and how far is a point from the first line?
Open toolSurface and Volume of Revolution (Pappus–Guldinus)
What surface area and volume does a profile sweep out when it is revolved about an axis?
Open toolTank and Vessel Volume with Heads
What is the total volume of this vessel including its ends?
Open toolTriangle from Two Sides and an Opposite Angle
Which triangles have these two sides and the angle opposite one of them?
Open toolTriangle Solver
What are the missing sides, angles and area of this triangle?
Open toolVolume and Surface of Solids
What volume, surface area and mass does this solid have?
Open tool3 × 3 Matrix Determinant, Adjoint and Inverse
What are the determinant and inverse of this 3 × 3 matrix?
Open toolArithmetical and Geometrical Progressions
What is the last term and the sum of this arithmetical or geometrical progression?
Open toolComplex Number Calculator
What is the sum, difference, product or quotient of these complex numbers, in rectangular and polar form?
Open toolFactorials, Permutations and Combinations
How many arrangements or selections of r items from n are possible?
Open toolGeometric Speed and Size Series
What geometric series of speeds (or sizes) runs between these limits in this many steps?
Open toolPreferred Number (Renard) Series
Which preferred numbers fall between these limits in the chosen Renard series?
Open toolPrime Factors, Greatest Common Divisor and Least Common Multiple
What are the prime factors of these numbers, and their greatest common divisor and least common multiple?
Open toolQuadratic and Cubic Equation Solver
What are the roots of this quadratic or cubic equation?
Open toolSimultaneous Equations and 3 × 3 Matrix
What solves these two or three simultaneous linear equations, and what are the determinant and inverse?
Open toolTrigonometric and Involute Functions
What are the trigonometric, versed and involute functions of this angle, or the angle for an involute value?
Open toolAbout WORKOS
WORKOS covers the engineering, manufacturing, operations and commercial decisions a team makes every day. Each tool shows its method, checks what could go wrong, tests how sensitive the answer is and gives you a report you can share with confidence.
MAKEOS engineering toolkit is the WORKOS collection of calculators built on established engineering methods. It covers machining, mechanical design, fasteners and gears, power transmission, fluid power, fabrication, quality and maintenance. Every result shows its working and tells you what to verify before you rely on it. Browse the MAKEOS toolkit →
- Methods shown in full, with feasibility and verification checks.
- Sensitivity analysis and decision reports you can download, print or share.
- No account needed. Calculations run in your browser.
KEVOS® WORKOS
Tool
WORKOS tools are screening and decision-support utilities. Verify important financial, engineering, safety, legal or operational decisions using appropriate professional standards and your organisation’s approved data.
