A caliper assembly typically consists of a machined caliper housing with pistons, seals / boots, machined bracket, shoe and linings, and a pin suspension system that allows the housing to float with respect to the rotor during braking events and self adjust due to wear. In a disc brake system, a caliper assembly is used to apply the braking force to the rotor. The pressurized fluid from the master cylinder actuates a piston in a caliper assembly. This piston then forces the friction material (shoe and lining) against a brake rotor that is fastened to the wheel of the vehicle. Thus as the rotor slows down from the frictional force, the wheel and the vehicle slows down. The brake torque forces react through the lining shoe, to the caliper bracket, to the knuckle and through the suspension.

Using state of the art analytical tools and test methodologies, BWIGroup has balanced various design characteristics like housing/bracket stiffness, seal design, and the housing suspension system to optimize key performance criteria such as pressure distribution, wear, noise, drag, displacement, cost etc. By balancing the pressure distribution, the brake linings wear uniformly, resulting in consistent, smooth, and quiet brake operation. In addition, BWIGroup’s calipers have low drag, which is accomplished without excessive fluid displacement. As a former lining manufacturer, BWIGroup has the understanding and capability to run full lining selection programs and explain performance/ cost trade offs so customers can make the best choice for their vehicle.

BWIGroup’s caliper portfolio includes both single and dual piston calipers, and both front and rear calipers. With a large selection of piston sizes, BWIGroup’s caliper family supports a diverse range of applications for small car to large trucks and SUVs. BWI offers cast iron and aluminum caliper housings. Integral rear calipers designs optimize system parking brake cost.