Cutting Power

What is this formula?

Cutting Power calculates the mechanical power required to remove material during a machining operation. It relates cutting force and cutting speed, making it useful for checking whether a machine tool has enough available power for the selected cutting conditions.

When to use it

Use this formula when estimating machining power demand, selecting machine tools, verifying cutting parameters, preventing spindle overload, or comparing machining conditions.

Example

A turning operation uses a cutting force of 1200 N and a cutting speed of 180 m/min.

Data:

Fc = 1200 N

Vc = 180 m/min

Formula:

Pc = (Fc × Vc) / 60000

Substitution:

Pc = (1200 × 180) / 60000

Result:

Pc = 3.60 kW

The machining operation requires approximately 3.6 kW of cutting power.

Applications

Turning operations

Milling operations

Machine tool selection

Spindle power verification

Machining cost estimation

Note

This formula estimates the theoretical cutting power using cutting force and cutting speed. Actual machine power demand may be higher because of spindle efficiency, drivetrain losses, tool wear, coolant conditions, interrupted cutting, and process instability.