Patent ID: 7416476

Claim:
A method of grinding a brake pad comprising the steps of: transferring a brake pad set comprising a backing plate made of steel and a brake pad attached to the backing plate by a movement of a conveyor; fixing the brake pad set to a fixing section having an electromagnet when the brake pad set has reached a grinding position where the fixing section is formed on said conveyor and the brake pad set is fixed when the electromagnet is activated; and grinding said brake pad by a rotary whetstone with the rotary whetstone moving in relation to the brake pad set in an intersecting direction to a rotation axis of said rotary whetstone, said rotation axis of said rotary whetstone being parallel to a friction face of the brake pad, a distance from a grinding face of said rotary whetstone to said rotation axis increases gradually or in a plurality of steps in one direction of the rotation axis, and a distance from another grinding face of said rotary whetstone to said rotation axis decreases gradually or in a plurality of steps in said one direction of the rotation axis.