COF Tester / Coefficient of friction tester / Peel tester

What is friction coefficient or COF?

The friction coefficient or COF is a number that indicates the degree of friction between two surfaces.

A distinction is made between static friction coefficient and the dynamic friction coefficient. The static coefficient of friction is the ratio between the maximum friction force before the surfaces start to move in relation to each other and the normal force.

The dynamic coefficient of friction is the ratio between the frictional force and the normal force as the surfaces move relative to each other already.