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Machining Power Calculator

Enter cutting force and cutting speed — required power updates instantly.

Formula

Pc = Fc · vc / 60,000   (Fc in N, vc in m/min → kW)

Example

Fc = 600 N at vc = 120 m/min → Pc = 1.2 kW; with 80% spindle efficiency the motor needs ≥ 1.5 kW.

FAQ

Why divide by 60,000?

Unit conversion: N·m/min → kW requires dividing by 60 (seconds per minute) and 1000 (watts per kW).

What efficiency should I assume?

Spindle drives run 75–90% efficient depending on size and gearing; 80% is a safe planning value.