What are the two primary types of air brakes?

The two primary types of air brakes used in vehicles are disc brakes and drum brakes. Both of these systems operate differently, but they are essential components in providing effective braking in commercial vehicles.

Disc brakes utilize a rotor that is clamped by brake pads when the brake is applied, which results in effective stopping power and efficient heat dissipation. This system tends to have consistent performance, especially in high-demand braking situations, and is less prone to fading under heat compared to drum brakes.

On the other hand, drum brakes involve a round drum that rotates with the wheel. When the brakes are applied, brake shoes expand against the inner surface of the drum to create friction and slow down the vehicle. Drum brakes are often favored for their ability to provide strong braking performance at low speeds, although they may struggle with heat buildup during sustained braking.

Together, these braking systems are crucial in air brake operations, allowing for safe and controlled stopping of heavy vehicles on the road.