What is the Brake Calipers?

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Brake Calipers:

The brake caliper is the assembly that houses the restraint and pistons. The pistons are usually the product of plastic, aluminum, or chrome-plated steel.

Calipers are of two types, floating or fixed. A set caliper doesn’t move relative to the disc and is thus less tolerant of disc imperfections. It uses one or more pairs of opposing pistons to clamp from all sides of the disc and is more complex and expensive than a floating caliper.


Floating Caliper:

A floating caliper (also called a “sliding caliper”) moves concerning 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 makes contact with the braking surface, then pulls the caliper body with the outer brake pad the pressure is applied to either side of the disc.

Floating caliper (single piston) designs are subject to sticking failure, caused by dirt or corrosion entering a minimum of one mounting mechanism and stopping its normal movement. This causes the caliper’s pads to rub on the disc when the brake isn’t engaged or engaging it at an angle. Sticking may result from infrequent vehicle use. Failure of a seal or rubber protection boot allowing debris entry, dry-out of the grease within the mounting mechanism, and subsequent moisture incursion resulting in corrosion, or some combination of those factors.



Consequences may include reduced fuel efficiency, extreme heating of the disc, or excessive wane of the affected pad. A sticking front caliper may additionally cause steering vibration.

Another variety of floating caliper is a swinging caliper. Rather than a pair of horizontal bolts that allow the caliper to maneuver straight in and out respective to the car body, a swinging caliper utilizes one, vertical pivot bolt located somewhere behind the axle centerline. When the motive force presses the brakes, the brake piston pushes on The within piston and rotates The full caliper inward, when viewed from the highest.

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