30x47x7 oil seal


The expansion of the brake shoes is facilitated by a cam mechanism, which converts the linear motion of the brake pedal into the radial movement of the shoes. The cam rotates and pushes the shoes outward, increasing contact with the drum surface. Friction between the shoes and the drum generates the necessary braking force to slow down or stop the vehicle.
mechanical drum brake diagram

One of the primary consequences of operating with a brake drum that is below its minimum thickness is overheating. As the drum wears down, it may not dissipate heat efficiently, which can cause the brakes to overheat. Overheating can lead to brake fade, where the effectiveness of the brakes diminishes significantly, making it harder to stop the vehicle. This can be particularly dangerous in emergency situations where rapid stopping is necessary.
minimum brake drum thickness
