THE BEDDING OF BRAKE PADS
The bedding of brake pads is an essential factor in the effective beginning of their usage. The bedding regime is indicated in the brake pads usage instructions. Every producer chooses the best bedding regime for its production. Some producers recommend avoiding emergency for the first 100 km, others recommend the run to reach 320km. Some limit the temperature of the braking system up to 100oC, while others up to 300oC. During the bedding period, the brake pads are not working the most effectively, so you should not be surprised that the newly changed brake pads will brake not as good as the old ones, that were replaced. The aim of bedding is for brake pads to reach their full working capacity as fast as possible, which is to use the whole top surface - at least 80% of the whole surface have be used when braking. This is necessary in order to assure that the heat caused by the friction between the brake pads and brake discs would be evenly distributed throughout the brake pad, rather than concentrating on separate regions damaging not only the brake pads but the brake discs as well. Producers try to fasten the bedding process. Some producers apply a coat of fiction material that contains more abrasive that speeds up the bedding on the top of the brake pad. Others form the friction material from several thicknesses that contain more abrasive on their surface. However, the more abrasive there is, the faster the brake disc is damaged. Another way to fasten bedding period is thermo shock. It is a procedure during which the top surface of the brake pad is affected by high temperatures. After this procedure the brake pads are not "afraid" of high temperatures and the brake disc is not affected by the abrasive.
Certified Lithuanian brake pads "KGGI" are affected by thermo shock. This helps to save their best qualities: short bedding period, high braking efficiency and polishing of the brake disc.
Screeching is a very frequent complaint in brake systems. Regardless of the production defect, wear and unevenness on the brake disc are the reasons of vibration and screech. In this case the working contact between the surface of brake pads and brake discs is insufficient. The separate parts of the surface have different load, they get more load than the rest parts. It is quite possible that cracks appear on brake disc surfaces and wear and tear. All these reasons give vibrations and a screech in the braking system. The effective solution is a machining of a brake disc. This operation is widespread in Europe and is recommended before the replacement of brake pads. Having performed such an operation the brake disc is protected from a big and deep damage. Braking becomes more effective and less noisy after that.