Machining Parameters · Released

Spindle Speed Calculator

Calculate a recommended spindle speed from cutting speed and effective diameter.

Cutting speed (m/min)

Effective diameter (mm)

Machine maximum RPM (optional)

Calculated spindle speed

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Formula

RPM = (1000 × Cutting speed) ÷ (π × Diameter)

Use the effective cutting diameter. For turning, this normally changes as the workpiece diameter changes.