Brake caliper refers to caliper disc brake, which is a kind of disc brake. Its rotating element is a metal disc with an end face, which is called a brake disc.

The fixed element is a brake pad composed of a friction pad with a small working area and its metal back plate. There are 2 ~ 4 brake pads in each brake. These brake pads and their actuating devices are installed in clamp shaped supports across both sides of the brake disc, which are collectively referred to as brake caliper. The brake disc and the brake caliper together form a caliper disc brake.

According to different installation positions, the brake can be divided into wheel brake and central brake. The brake whose rotating element is fixed on the wheel or axle shaft is called wheel brake; The brake whose rotating element is fixed on the transmission shaft of the transmission system is called the central brake. Wheel brakes are generally used for service braking, but also for emergency braking and parking braking.