Brake is the very important part of your car, because it is function to stop the car and to keep safe for other driver. A brake is a device used to slow down or stop a moving object. It operate by converting the energy of motion, which is called kinetic energy, into some other form of energy, usually heat energy. A stationary part, the brake shoe, is pressed against rotating part, commonly a shaft, disk or drum, producing a large amount of friction. The brake shoe usually provided with a lining made of heat-resistance friction material, often containing asbestos. The brake shoe may be pressed against the rotating part mechanically, pneumatically, electromagnetically or hydraulically.
Block, Disk, Drum, and Band Brake
Various types of brake distinguished. The simples types is the single block brake. The concave side of a block is pressed against the rotating part, which is usually a wheel or drum fastened to a shaft. This type of brake was used in horse drawn vehicles. Vibration of the wheel shaft can be prevented by the use of a double block brake, in which two blocks are symmetrically positioned on opposite sides of the shaft. The disk brake has a block that pressed against the flat surface of a disk rather than against the wheel rim. An example is a caliper disk brake, which was originally developed for aircraft and is now used in automobiles; the same type is used in bicycles. Two opposed blocks (brake shoes) squeeze between them like a pair of calipers. Because disk brakes are not enclosed, they allow air to flow over them, dissipating heat rapidly.