Understanding Drum and Disc Brakes: A Comprehensive Guide
Drum Brakes
Drum brakes utilize friction against the inner surface of a drum attached to the wheel. Each drum houses brake shoes lined with friction material and held in place by springs. When the brakes are applied, the shoes press against the drum, creating friction and slowing the vehicle.
Adjustment in Drum Brake Systems
As brake shoes wear down, the distance between them and the drum increases, leading to reduced braking efficiency. To counteract this, drum brakes require periodic adjustment to maintain optimal performance.
Disc Brakes
Disc brakes are prevalent in modern vehicles due to their superior stopping power and heat dissipation. They consist of a rotor attached to the wheel hub and a caliper housing brake pads. When the brakes are engaged, the caliper squeezes the pads against the rotor, generating friction and slowing the vehicle.
Advantages of Disc Brakes
- Balanced pressure distribution
- Automatic adjustment
- Superior cooling
- Lighter weight
- Easier maintenance
Disadvantages of Disc Brakes
- Smaller braking surface area
- Potential for noise
Handbrake (Parking Brake)
The handbrake, also known as the parking brake, is a manually operated brake typically acting on the rear wheels. It secures the vehicle when parked and provides an emergency braking option in case of primary brake failure.