To what extent is the friction plate of the disc brake worn
Many disc brakes are equipped with a wear indicator. When the friction plate is worn to a predetermined thickness, the indicator will contact the brake plate and generate a high-frequency squeal. Therefore, if the above fault is found in the inspection, the friction plate must be replaced in time. (Note: Some countries may have regulations regarding the replacement of friction discs before they reach a small thickness, so the wear indicator should be calibrated according to their own requirements.)
If the wear indicator has been deformed, it is easy to replace it because it is difficult to correct its position from behind. If it is found during the inspection that the friction plate has peeled off, separated, cracked or severely damaged, or brake fluid has flowed out, the friction plate should be replaced
SBD friction plate image
Compared with the drum brake, the working surface of the disc brake is flat and heat transfer occurs on both sides. When the disc rotates, it is easy to cool down and is not prone to large deformation. The braking efficiency is relatively stable. After a long time of use, the brake disc has enhanced its braking effect due to high temperature expansion; The drum brake has a single side heat transfer and a large temperature difference between the inner and outer sides, which makes the brake drum prone to deformation. At the same time, after prolonged braking, the brake drum expands due to high temperature, and the braking efficiency is weakened. In addition, the disc brake is simple in structure, convenient in maintenance, and easy to realize automatic adjustment of brake clearance.