The basic shape of the brake drum is a drum, and there are connecting holes on the mounting surface. According to the different manufacturing methods, the structure of the brake drum mainly has the following three kinds

1, integral casting type

Brake drum is made of high strength gray cast iron or alloy cast iron containing Cr. This kind of brake drum has the advantages of simple structure, convenient processing, large heat capacity, but large mass, and is mostly used in medium and heavy duty vehicles.

2, steel plate and cast iron combined type

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

3, light alloy combined with cast iron

The main body of the brake drum is light alloy material (such as aluminum alloy, etc.), lined with cast iron bushing. This kind of brake drum is not only small in mass, but also good in heat dissipation. It is mostly used in cars.