disc brake

disc brake
A type of brake that has two basic components: a flat rotor (disc) that turns with the wheel and a caliper that is stationary. When the brake pedal is depressed, linkage (mechanical or hydraulic) causes the caliper to force its heat-resistant brake pads against both sides of the rotating disc thus slowing or stopping the wheel. Almost all new cars have disc brakes on the front wheels with drum brakes on the rear. More expensive cars have four wheel disc brakes. Because of the need for greater pressure to activate disc brakes, most cars so equipped also have a power booster. Wear takes place in the pads and the rotors. The pads are usually replaced while the rotors can sometimes be reground else they too must be replaced. If the rotors are not tightened correctly when installed, they can warp and cause a jerking motion when stopping.
Also see
brake, disc type

Dictionary of automotive terms. 2015.

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  • disc brake — disc′ brake n. aum a brake system in which a disc attached to a wheel is slowed by the friction of brake pads being pressed against the disc by a caliper • Etymology: 1900–05 …   From formal English to slang

  • disc brake — n. a brake, as on an automobile, that functions by causing two friction pads to press on either side of a disc rotating along with the wheel …   English World dictionary

  • Disc brake — Close up of a disc brake on a car On automobiles, disc brakes are often located with …   Wikipedia

  • disc brake — noun hydraulic brake in which friction is applied to both sides of a spinning disk by the brake pads • Syn: ↑disk brake • Hypernyms: ↑hydraulic brake, ↑hydraulic brakes • Part Meronyms: ↑brake disk, ↑brake pad * * * …   Useful english dictionary

  • disc brake — Auto. a brake system in which a disc attached to a wheel is slowed by the friction of brake pads being pressed against the disc by a caliper. Also, disk brake. [1900 05] * * * …   Universalium

  • disc brake — noun Date: 1904 a brake that operates by the action of a frictional material pressed against the sides of a rotating disc by a caliper …   New Collegiate Dictionary

  • disc brake — noun a type of vehicle brake employing the friction of pads against a disc attached to the wheel …   English new terms dictionary

  • disc brake — /ˈdɪsk breɪk/ (say disk brayk) noun a brake, commonly used on the road wheels of motor vehicles and the landing wheels of aircraft, in which friction is obtained by the action of pads on a flat disc attached to the rotating part to be slowed down …  

  • disc brake — noun A type of brake where the friction is produced by brake pads which are pressed against a disk …   Wiktionary

  • disc brake gauge — A tool for measuring the thickness, wear, and score depth on brake discs …   Dictionary of automotive terms

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