What is the difference between disc brakes and drum brakes?

[LaLucille]

The difference between disc brakes and drum brakes lies in their working principles: disc brakes achieve braking by applying hydraulic pressure to the caliper, which clamps the friction material against the brake disc; drum brakes work by incorporating pistons inside the brake drum, which are hydraulically actuated to press against the drum, creating friction for braking. Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, and other transportation tools or machinery. The principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base, which generate braking torque under external force.