perform the braking action. A disc brake is a type of brake that uses calipers to squeeze the pairs of pads against a rotating disc in order to create friction that slower the rotation of a shaft such as a vehicle axle, either to reduce its rotational speed or to make it stationary. The energy of motion is converted into waste heat which must be dispersed. Disc brakes are commonly used for vehicle braking but they are applicable to almost any rotating shaft. The brake disc (or rotor in American English)