KEVOS® MAKEOS · Manufacturing
Cylindrical 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?
Plan of an external traverse cylindrical grinding operation: wheel surface speed against the wheel’s marked maximum, work speed from the work surface speed, speed ratio, equivalent diameter and contact length (as the grinding geometry tool), traverse rate from the share of wheel width per work revolution, removal rate and grinding power from your specific grinding energy, and passes and time for the stock with spark-out (as the grinding cycle time tool).
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How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Wheel diameter | mm | Diameter of the grinding wheel. |
| Wheel speed | rpm | Wheel spindle speed. |
| Wheel maximum operating speed (marked) | m/s | Maximum operating speed marked on the wheel; never exceed it. |
| Work diameter | mm | Diameter of the work. |
| Work surface speed | m/min | Surface speed of the work. |
| Wheel width | mm | Width of the grinding wheel. |
| Traverse per work revolution (share of wheel width) | % | Axial traverse per work revolution as a share of wheel width (about 1/2–2/3 roughing, 1/4–1/3 finishing). |
| Length ground | mm | Length of the ground diameter. |
| Depth per pass (radial) | mm | Infeed per pass on the radius. |
| Stock to remove (radial) | mm | Total stock on the radius. |
| Spark-out passes | Passes without infeed at the end. | |
| Specific grinding energy | J/mm³ | Specific energy to grind the material with this wheel (your value). |
| Spindle motor power | kW | Rated power of the wheel spindle motor. |
| Spindle efficiency | % | Share of motor power available at the wheel. |
Method and formulas
- Wheel speed v_s = π d_s n_s ÷ 60 000; work speed n_w = 1000 v_w ÷ (π d_w); speed ratio = v_s ÷ v_w.
- Equivalent diameter D_e = d_s d_w ÷ (d_s + d_w); contact length l_g = √(a_e D_e) (as the grinding geometry tool).
- Traverse rate = share × b × n_w; removal rate Q = π d_w a_e × traverse rate; power = u Q.
- Passes = stock ÷ a_e (rounded up) + spark-out; time = passes × (L + b) ÷ traverse rate (as the grinding cycle time tool).
- Example: the wheel runs at 33.51 m/s; traversing at 1,909.9 mm/min removes 50 mm³/s with 1.5 kW; the job takes 1.1938 min.
Limitations
- External traverse grinding; plunge and internal grinding differ.
- Specific energy varies strongly with wheel sharpness and depth of cut.
- Example values are illustrations. Replace them with values for your actual task.
Typical uses
- Plan a cylindrical grinding operation
- Check spindle power and wheel speed
- Estimate grinding time for a shaft diameter
Who it is for
- Grinding machinists
- Process planners
- Manufacturing engineers
What you get
- Wheel and work speeds, speed ratio, contact length
- Traverse rate, removal rate and power
- Passes and grinding time
Interpreting the result
- A finer traverse improves finish and roundness but lengthens every pass.
References
- Machinery’s Handbook, 29th edition (Industrial Press, 2012), printed pp. 1199–1268. Topic reference; no source tables or recommended settings are reproduced.
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.
Open the Cylindrical Grinding Planner (Traverse: Speeds, Power and Time) calculator
