The disc is usually made of cast iron. In some cases, it may be made of composites such as reinforced carbon–carbon or ceramic matrix composites. This is connected to the wheel and the axle. To slow down the wheel, friction material in the form of brake pads, mounted on the brake caliper, is forced mechanically, hydraulically, pneumatically, or electromagnetically against both sides of the disc. Friction causes the disc and attached wheel to slow or stop.
The disc is usually made of cast iron. In some cases, it may be made of composites such as reinforced carbon–carbon or ceramic matrix composites. This is connected to the wheel and the axle. To slow down the wheel, friction material in the form of brake pads, mounted on the brake caliper, is forced mechanically, hydraulically, pneumatically, or electromagnetically against bo?th sides of the disc. Fr:iction causes the d,isc and attached wheel to slow or stop.