Some people will ask what is the brake drum? What is the role in the car brake? Let me briefly talk about it for you.

Brake drums are used only for low-end cars or trucks and buses. It is a part of the drum brake system. When braking, the piston exerts pressure on the two pairs of half-moon brake shoes to make them close to the inner wall of the drum, thereby generating friction to stop the rotation of the wheel; in short, it is used to give For the wear of the brake pads, brake through the friction with the brake pads-stop/reduce the speed. The gap of the brake drum should be adjusted regularly, and the two sides should be the same, otherwise the brake will deviate (very dangerous)

The advantage of this brake drum is that the effect is good and the price is low, but the heat dissipation is not very good, especially when the oil is long downhill. So big trucks have water spray on their wheels.