Brake Drum

A brake drum is a component of a drum brake system used in vehicles. It is a cylindrical-shaped drum that is typically made of cast iron or other durable materials. The brake drum is mounted on the wheel hub and rotates along with the wheel.

When the brake pedal is pressed, hydraulic pressure is applied to the brake shoes, which are located inside the brake drum. The brake shoes are lined with friction material, usually made of a heat-resistant material like asbestos or ceramic, which creates friction against the inner surface of the brake drum. This friction slows down or stops the rotation of the drum and the wheel, thereby slowing down or stopping the vehicle.

Brake drums are commonly used in the rear wheels of many vehicles, especially in older models or heavy-duty vehicles. They are known for their durability and ability to handle high heat and heavy loads. However, in modern vehicles, disc brakes are more commonly used in all wheels due to their superior performance and ease of maintenance.