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Drum brake (upper right) with the drum removed (lower left, inside facing up), on the front of a Ford Falcon Sprint A rear drum brake on a Kawasaki W800 motorcycle. A drum brake is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating bowl-shaped part called a brake drum.
Many other self-assist designs, such as band brakes and many common drum brakes, have exponential self-assist, described by , where is the natural logarithm base, is the coefficient of friction between shoes and drum, and is the angle of engagement between shoes and drum. A small change in friction causes an exponential change in self assist.
The brake lining may also become contaminated by oil or leaked brake fluid. Typical symptoms will be brake chatter, where the pads vibrate as the lining grabs and releases the rotor's surface. The solution is to repair and clean the source of the contamination, replace the damaged pads and possibly also have the rotors re-skimmed or replaced if ...
Honda RCB with a front ventilated drum brake from Italian accessories manufacturer Grimeca. Drum brakes have a self servo effect. [11] The most common design is a leading-trailing design. More exotic design had four, eight or sixteen shoes. [4] Some motorcycles used finned and/or vented housings for additional cooling, the first of which was ...
A wheel cylinder is a component of a hydraulic drum brake system. [1] It is located in each wheel and is usually positioned at the top of the wheel, above the shoes. Its function is to exert force onto the shoes so as to bring them into contact with the drum and stop the vehicle with friction. [2]
Friction (pad/shoe) brakes are often rotating devices with a stationary pad and a rotating wear surface. Common configurations include shoes that contract to rub on the outside of a rotating drum, such as a band brake; a rotating drum with shoes that expand to rub the inside of a drum, commonly called a "drum brake", although other drum ...
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