The friction between the brake drum and brake pads acts as a brake. The brake hub, scientific name brake drum, is the main component of the drum brake system. When braking, the inner surface of the brake drum rubs against the brake pads, which acts as a brake.

The functions of the brake drum are as follows:
1. The braking effect is mainly generated through friction with the brake shoes to stop the car;
2. Mainly used in low-end models and large trucks;
3. The price is low and the braking effect is good, but the heat dissipation effect is not good;
4. Braking downhill for a long time will cause the brakes to fail. Generally, it is equipped with water spray equipment to enhance heat dissipation;
5. The brake drum has a gap that needs to be adjusted regularly, and the two coaxial wheels must be the same, otherwise there is a risk of braking bias.

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