Drilled Brake Disc Rotor 355*22mm Perforated Center Cap Bracket

Brake disc
The brake disc is an important component of the brake system. If the brake system is to be able to decelerate the vehicle in safety and comfort at all times – bringing it to a complete stop if necessary

Depreciation
Brake discs are exposed to very high mechanical and thermal loads. Added to these are environmental factors such as spray water, road grime and spreading material. They are therefore subject to natural wear. The condition of the brake discs is checked during every vehicle inspection. If the wear limit has been reached, they must be replaced in order to safeguard the reliable functioning of the brake system.

Many manufacturers have started to offer coated brake discs for brake repairs. Brake discs of this type are coated with a special paint which protects the brake discs (not the friction surface) against corrosion. As they retain their attractive appearance over time, coated brake discs are a good choice for open wheel rims.

Function
The brake disc is an important component of the brake system. If the brake system is to be able to decelerate the vehicle in safety and comfort at all times – bringing it to a complete stop if necessary – the brake disc must combine with the brake pads to generate a brake torque (a brake force). This torque is transmitted to the wheel hub and from there to the wheel rim. During braking, the vehicle's kinetic energy is converted into thermal energy due to friction between the brake pads and the brake disc, thereby enabling a reduction in speed to be achieved.

90% of the heat generated during braking penetrates the brake disc initially, where it is buffered. After this it is passed on to the ambient air. The brake disc thus functions like a heat exchanger. However, its ability to absorb heat is limited. Therefore, the heat must be dissipated to the ambient air quickly if damage due to overheating is to be avoided.

ORIGIN OF BRAKE DISC
The disc brake was originally developed for motor sport. Having enjoyed considerable success in that field, it rapidly established itself in the front wheels of passenger cars in the 1960s.

The drum brake that had been used prior to this time had numerous weak points brought about by its design, including temperature problems, distortion and fading, oscillating friction values, poor dosing, high wear and noise generation (squealing). For many years after this, the disc brake was only seen very rarely at the rear wheels, where thermal load is lower.