Cutting speed ↔ spindle speed
Convert Vc ↔ n by diameter (turning/milling): n = 1000·Vc/(π·Dc).
How to use
- Enter the calculation conditions
Enter the dimensions, loads, speeds or operating conditions requested by the form.
- Run the calculation
The tool applies the formulas shown on this page to the entered values.
- Review the result
Review the resulting specification and checks, then verify them against the cited source, current standard and real operating conditions before use.
Core formula
n = 1,000 · Vc / (π · Dc)
Example using default values
n = 1,000 · 120 / (π · 50) = 764 rpm
Source: Sandvik Coromant turning and milling formulas.
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