What is the working principle of a floating caliper disc brake?

[DiJosie]

The braking principle of a floating caliper disc brake: During braking, the piston first moves to the right, pushing the brake pad towards the brake disc. When it comes into contact with the brake disc, the friction at this point is relatively small and insufficient to stop the car. Subsequently, the brake caliper body moves to the left along the guide pin under the reaction force. Finally, both sides clamp the brake disc together, bringing the car to a halt. More details are as follows: 1. The working principle of a floating caliper disc brake differs from that of a fixed caliper disc brake. The floating caliper disc brake remains in a floating state during operation, with the wheel cylinder located on the inner side of the brake caliper and only half the number compared to the fixed type. During braking, it utilizes internal friction to generate a reaction force. 2. The floating caliper disc brake has no hydraulic components on the outer side, preventing vapor lock, and occupies relatively little space. Notably, it can incorporate a parking brake mechanism via the inner piston. The wear levels of the inner and outer friction pads differ, with inconsistent wear speeds during operation. Comparatively, the inner friction pad wears faster than the outer one. 3. On many cars, the brake is equipped with a friction pad warning device. After prolonged use, the friction pads will experience necessary wear. Once the wear reaches a certain level, the warning device will immediately alert the driver, reminding them that the brake friction pads need immediate replacement. 4. Generally, disc brakes are primarily used on the rear wheels of vehicles. However, this type of brake has a relatively wide range of applications. Compared to ordinary brakes, disc brakes also have a significantly longer service life.