What is the function of the caliper in a braking system?

The caliper plays a crucial role in the functioning of disc brake systems. It is designed to compress the brake pads against the rotors, which is essential for creating friction that slows down or stops the vehicle. When the driver presses the brake pedal, hydraulic fluid is transmitted through the brake lines, causing the caliper to move. This movement pushes the brake pads against the rotor, generating the necessary friction to reduce the speed of the vehicle.

In contrast to the other functions listed, the caliper does not expand brake shoes against a drum, generate hydraulic pressure, or delay pressure to the brakes. Its primary responsibility is to effectively squeeze the pads onto the rotor, which is key to achieving efficient braking performance.