Spindle Turning Speed Calculator
Maximum RPM from workpiece diameter and material.
Inputs
Results
Roughing RPM
3,000
Finishing RPM
3,600
Adjusted roughing RPM3,000
Roughing SFM1,571
Finishing SFM1,885
Slenderness ratio6
Needs steady rest? (1=yes)0
Tailstock Critical1
How to Use This Calculator
- Enter Workpiece diameter (in), Workpiece length (in), and Material (0-4).
- Set Lathe max RPM.
- Review Roughing RPM and Finishing RPM.
- Use Adjusted roughing RPM and Roughing SFM to inform your decision.
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