This is one type of brake which currently utilized in most of vehicle and moving parts. It has wide range utilization, from plane, high speed train, sport car until the bicycle. The body is usually made of cast iron, but in some cases made of composites such as reinforced carbon-carbon or ceramic matrix composites, depend on the specification required. Disc Brake is connected to the vehicle through Mounting Support. To stop or adjust the speed of moving part, friction material in the form of brake pads is forced mechanically, hydraulically, pneumatically or electromagnetically against both sides of the rotor disc.