Engineering↗
Torque and Tension in Fasteners
What tightening a bolt actually does: preload as the purpose, the torque-tension relation and its unreliable friction factor, how little of the applied torque becomes tension, t…
Engineering
Mechanical
Mechanical articles in the KEVOS Engineering library. 201 pages.
All Engineering 1381Civil & Structural 21Mechanical 201Electrical 16Engineering Mathematics 1070Computing & Software 20Manufacturing 53
Engineering↗
Transmission Chains
The positive drive between belt and gear: roller-chain anatomy as a string of tiny plain bearings, chordal action worked across the tooth counts, chain speed and the pitch serie…
Engineering↗
Twist Drills and Counterbores
Drilling holes with the twist drill: point and helix angles, the chisel edge and thrust, speed and feed, and the counterbores, countersinks and spotfaces that finish a hole for …
Engineering↗
Unified Screw Threads
The inch 60° system: how wartime incompatibility produced the Unified compromise, the basic profile from H = 0.866p, reading a designation, coarse against fine worked at half an…
Engineering↗
US and Metric System Conversions
Converting between US customary/imperial and metric units: the exact inch and pound that anchor every factor, computed conversion tables for length, mass and force, pressure and…
Engineering↗
Welding
Joining metal by fusion: how welding melts the parts together with a filler of like composition, the main arc processes, heat input and its calculation, the heat-affected zone a…
Engineering↗
Whitworth Threads
The 1841 original: the fully radiused 55° form, its geometry worked at quarter-inch BSW, what the radius buys in fatigue and sealing, why 55° never mates with 60°, and where the…
Engineering↗
Wing Nuts, Wing Screws and Thumb Screws
The fasteners tightened by hand: wing nuts, wing screws, thumb screws and knurled heads, the computation of what finger torque actually achieves on a thread, and the design cons…
Engineering↗
Worm Gearing
Worm gearing for high single-stage ratios on non-intersecting right-angle shafts: the worm and wheel, lead and lead angle, ratio, centre distance, the self-locking condition, sl…