A running car has some amount of kinetic energy, and the brake disc has to get rid of this energy from the car. A brake disc is solely responsible to stop your car. Ever wondered how do the brakes do this? Each time you stop your car, your brakes convert the kinetic energy to heat energy. This is generated by the friction between the pads and the disc. The brake pads then jam the propeller in its place of the wheel. They also then apply the force which is transmitted hydraulically as an alternative to a cable. The car slows down due to the friction between the two components.
Autokartz.com offers Original Brake Disc with Liner suitable for AC and DC operated Electromagnetic Brakes which are used in Brake motors.