KEVOS® MAKEOS · Manufacturing
Surface and Cylindrical Grinding Cycle Time
How long will this surface, traverse or plunge grinding operation take?
Grinding time for reciprocating surface grinding (strokes per pass from crossfeed, passes from stock and downfeed), cylindrical traverse grinding (traverse rate from wheel width, traverse per revolution and work speed) and cylindrical plunge grinding (infeed rate), with spark-out passes or dwell.
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How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Operation | choice | Choose the grinding operation. |
| Stock to remove (depth, or on diameter for cylindrical) | mm | Material to remove; for cylindrical work enter the reduction in diameter. |
| Downfeed or infeed per pass (on diameter for cylindrical) | mm | Wheel feed per pass; for cylindrical work on the diameter. |
| Spark-out passes | Extra passes without feed to finish size and finish. | |
| Surface grinding | ||
| Work length | mm | Length of the ground surface. |
| Work width | mm | Width of the ground surface. |
| Overtravel each end | mm | Table overrun beyond each end. |
| Table speed | m/min | Table speed. |
| Crossfeed per stroke | mm | Crossfeed at each stroke (usually a fraction of wheel width). |
| Cylindrical grinding | ||
| Ground length | mm | Length of the ground diameter. |
| 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. |
| Work speed | rpm | Rotational speed of the work. |
| Plunge infeed rate (on diameter) | mm/min | Plunge infeed rate on the diameter. |
| Dwell or spark-out time (plunge) | s | Time at final size in plunge grinding. |
Method and formulas
- Surface: strokes per pass = ⌈B ÷ crossfeed⌉; stroke time = (L + 2 × overtravel) ÷ table speed; passes = ⌈stock ÷ downfeed⌉ + spark-out.
- Traverse: traverse rate = share × wheel width × work rpm; pass time = (ground length + wheel width) ÷ traverse rate; passes = ⌈stock ÷ infeed⌉ + spark-out.
- Plunge: time = stock ÷ infeed rate + dwell.
- Example: the default surface grinding job takes 5.6 min.
Limitations
- Approach, dressing and gauging time are not included.
- Feeds and speeds come from your wheel supplier and process data.
- Example values are illustrations. Replace them with values for your actual task.
Typical uses
- Quote grinding time for a part
- Compare traverse and plunge grinding
- Balance a grinding operation in a cell
Who it is for
- Machinists
- CNC programmers
- Manufacturing engineers
What you get
- Passes or strokes
- Grinding time
- Feed rates used
Interpreting the result
- Fewer, deeper roughing passes followed by light finishing passes usually shorten the cycle.
References
- Machinery’s Handbook, 29th edition (Industrial Press, 2012), printed pp. 1246–1265. Topic reference; no source tables or recommended settings are reproduced.
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Open the Surface and Cylindrical Grinding Cycle Time calculator
