Clutch Torque Capacity Calculator

Inputs

Engine torque (T_e)

Torque the clutch must hold.

N·m

Clamp force (F_c)

Pressure plate clamp force.

Friction coefficient (mu)

Effective clutch lining coefficient.

Mean friction radius (r_m)

Mean radius of the friction ring.

Friction surfaces (n)

Single-disc clutch usually has two friction interfaces.

Safety factor (SF)

Capacity divided by this factor for design comparison.

Default result

Design torque capacity

483.8N·m

Caution

Also computed

Torque margin108%

Raw torque capacity604.8N·m

Required clamp force8,371N

1,882 lbf

Method notes 2 notes

Uses a simple uniform-wear mean-radius torque model.
Real clutch holding torque depends on lining material, temperature, pressure distribution, break-in, flywheel condition, release travel and dynamic shock loads.