: a brake that operates by the action of a frictional material pressed against the sides of a rotating disc by a caliper compare drum brake
Illustration of disc brake
1 caliper
2 disc
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Front disc brakes became standard in 1959, with all-wheel discs from 1962 onward.—Robert Ross, Robb Report, 30 Jan. 2026 Braking comes in the form of disc brakes, both front and rear.—New Atlas, 27 Jan. 2026 On top of disc brakes at the axles, many employ regenerative braking, which converts kinetic energy into electricity that feeds back into the power grid or can be used by other trains.—Ben Jones, CNN Money, 26 Jan. 2026 The ride was smooth since the car was built with most General Motors extras available in 1967, including power steering, power disc brakes and air conditioning.—Laura Lane, USA Today, 12 Nov. 2025 See All Example Sentences for disc brake