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Clutch Disk Design Equations

Machine Design and Application

Clutch Disk Design Equations

The simplest type of clutch is the single-plate clutch in which an annular plate with a surface of friction material is forced against a metal disk by means of a spring, or springs, or by other means. There are two theories which give slightly different values of torque capacity.

Uniform-wear theory equation

Where:

F = spring force
r_o =outer radius of friction material
r_i =inner radius of friction material
µ = coefficient of friction

Uniform-pressure theory equation