The brake caliper is the assembly which houses the brake pads and pistons. The pistons are generally made from aluminum or chrome-plated steel.
Calipers are two types, floating or fixed. A fixed jaw is not moved with respect to the disk and therefore less tolerant disc imperfections. The use of one or more single or pairs of opposing clamping pistons on both sides of the disc, and is complex and costly a floating thickness.
A floating brake caliper (also known as “gauge”) located in relation to the disc, along a line parallel to the axis of rotation of the disc, a piston on one side of the disc pushes the inner brake pad until it is in contact with the braking surface, then pulls the caliper body with the outer brake pad so that pressure is applied to both sides of the disc. Floating brake caliper (single piston) designs are subject to sticking failure, caused by dirt or corrosion to perform at least one attachment mechanism and the cessation of normal movement. This can lead to the caliper of the pad is to rub on the disc when the brake is not engaged, or is at an angle. Paste can be the result of frequent use of the vehicle, the failure of a seal or rubber protection boot so that debris input, drying-out of the fat in the attachment mechanism and the subsequent invasion of moisture leads to corrosion, or a combination of these factors . Effects may include reduced fuel consumption and excessive wear of the affected path.
Brake Caliper – Pistons and cylinders
The most common brake caliper design uses a hydraulically operated piston in a cylinder, but high performance brakes to be used, but less than twelve. Modern cars use different hydraulic circuits to the brakes on each set of wheels as a safety measure. The hydraulic design also helps multiply braking force. The number of pistons in a thickness is often referred to as the number of “pot”, therefore, a vehicle “means that six pot calipers each bracket houses six pistons.
Brake failure may be due to failure of the piston to retreat, which is usually a result of the non-use of the car during prolonged outdoor storage under unfavorable conditions. At high vehicle-kilometers, the piston seals may leak, which must be corrected immediately. The disc must be of sufficient area to perform well, and the friction coefficient is the most important factor to be considered when designing a braking system.