What Are Drum Brakes And How Do They Work

Drum brakes are brakes that create friction from a set of shoes. These shoes push outward against a brake drum that is in rotation. This shoe is pressed on the inner surface of the brake drum.

This system comprises brake shoes, hydraulic wheel cylinders and a brake drum. The brake shoes are forced against the surface of the drum once a driver engages the pedal. These shoes are forced onto the brake drum by the hydraulic wheel cylinders. This results in friction that enables a vehicle to stop or slow down.

What Are Drum Brakes?

Drum brakes are mostly designed with two shoes attached on both sides of a drum. The lining of the brake attaches to a shoe. Hydraulic pressure or air within the drum brakes ensures that a vehicle can decelerate.

The more pressure is applied on a brake pedal the greater the shoes will press against the drums. Greater pressure is produced within the brake lines when such an action is done. Return springs pull the shoes away from the drum once the driver releases the brake pedal.

Barking torque needs to be considered when you are choosing a brake. The right model needs to be selected to ensure that energy dispersed while stopping does not lead to overheating. There are many sizes of drum brakes to choose from. Considerations need to be made during selection. These include the drum thickness, total pad area, drum diameter, running clearance, lining thickness and wearable friction area.

Brake drumThe Principles of A Drum Braking System

Drum brakes apply the same principles used by disc brakes. This is the principle whereby shoes press against a spinning surface. Drum brakes are mostly used on the rear wheels of many cars. These brakes are harder to service that disc brakes which are found on the front wheels of cars. Drum brakes cost less to manufacture. They can incorporate an abrupt brake mechanism with ease.

Drum brakes have many parts in comparison to other types of brakes such as the disc brakes. They come with various components that are critical to its functioning. These include the wheel cylinder, pushrod, adjuster spring, upper return spring, adjuster wedge, spindle, parking brake arm and cable, locating spring and shoe. All these components play specific roles in the functioning of drum brakes.

Drum brakes are very efficient when it comes to slowing down or stopping. They use shoes that press against the inner walls of a brake drum to help in deceleration. The harder the pedal is pushed, the faster the deceleration occurs.

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