Machining Parameters · Released

Power and Torque Estimator

Estimate cutting power and spindle torque from material removal rate, specific cutting energy, and spindle speed.

Material removal rate (cm³/min)

Specific cutting energy (J/mm³)

Spindle speed (RPM)

Estimated cutting power

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Formula and use

Power (kW) = MRR (cm³/min) × Specific cutting energy ÷ 60

Torque (N·m) = 9,549 × Power (kW) ÷ RPM

Specific cutting energy varies substantially by material, tool condition, and engagement. Use this as an early-stage estimate, then compare with machine and toolmaker data.