The basic shape of the brake drum is drum type, there are connection holes in the mounting surface, according to the different manufacturing methods, the brake drum structure mainly has the following three kinds

1. Integral casting

Brake drums are cast in whole from high strength grey cast iron or alloy cast iron containing Cr. This kind of brake drum is simple in structure, convenient in processing, large in heat capacity, but large in mass, and is mainly used in medium and heavy vehicles.

2. Combined steel plate and cast iron

Brake drum is composed of steel plate stamping drum disc and cast iron drum ring. It is of small mass and is used in cars and light vehicles.

3. Combination of light alloy and cast iron

The brake drum is made of light alloy (such as aluminum alloy, etc.) with cast iron lining. The brake drum is not only of small mass, but also of good heat dissipation, which is used in cars.