Turning Spindle Speed Calculator
Translate a user-specified surface cutting speed and workpiece diameter into rpm.
Your result
EVERYDAYEnter your values and select calculate.
On this page How it works & practical examples
How to use the Turning Spindle Speed Calculator
Use the workpiece diameter at the actual cut. A changing diameter changes the rpm needed to keep surface speed constant.
The calculation
Worked example
100 m/min at 50 mm workpiece diameter corresponds to about 636.6198 rpm.
Assumptions and limits
No suitable cutting speed is chosen by the calculator. Workholding, material, tool ratings and machine rpm limits are outside the entered-parameter conversion.
Common questions
Which inputs should I use?
Use the workpiece diameter at the actual cut. A changing diameter changes the rpm needed to keep surface speed constant.
What does the result exclude?
No suitable cutting speed is chosen by the calculator. Workholding, material, tool ratings and machine rpm limits are outside the entered-parameter conversion.