What is the difference between a floating disk and a fixed disk?

The difference between floating disk and fixed disk is: 1, and the structure is different: fixed disk mainly refers to brake caliper fixation; Floating means that the caliper floats. 2. The braking principle is different: when the brake is fixed, the piston in the caliper stretches out to clamp the brake pad on the brake disc, resulting in friction and braking torque. When the floating caliper slides freely on the shaft pin matched with the bracket, the piston extends out of the inner brake block and first contacts the brake disc. The fixed brake has the following disadvantages: 1, and there are many oil cylinders, which makes the brake caliper structure complicated. 2. The cylinders placed on both sides of the brake disc must be connected through the internal oil circuit or external oil pipe passing through the brake disc. This inevitably makes the calipers too big to be installed on the rims of modern cars. 3. When the heat load is high, the brake fluid in the oil cylinder (especially the outer oil cylinder) and the oil pipe or oil passage passing through the brake disc is easy to be heated and vaporized. 4. If you want to use the parking brake at the same time, you must install a mechanically driven parking brake caliper.