the cast-iron drum attached to the hub of a wheel of a motor vehicle fitted with drum brakes
See also brake shoe
brake drum in American English
1.
a heavy metal covering fitted over an automotive brake assembly and fastened to the axle: used in a braking system (drum brakes) in which internal brake shoes are pushed outward to contact the spinning drum from the inside
see also disc brake
2.
any rim that rotates rapidly in a braking assembly
brake drum in Automotive Engineering
(breɪk drʌm)
Word forms: (regular plural) brake drums
noun
(Automotive engineering: Vehicle components, Brakes, steering, wheels, tires, and suspension)
A brake drum is a closed cylinder attached to a vehicle wheel, against which a brake shoe presses to make the vehicle go slower or stop.
The inside surface of the brake drum must be smooth and uniform so that the brake shoe can be applied against it.
The brake shoes are forced by hydraulic wheel cylinders against the inner surfaceof the rotating brake drum.
A drum brake system consists of hydraulic wheel cylinders, brake shoes, and a brake drum.
brake, brake
Examples of 'brake drum' in a sentence
brake drum
Rather than a conventional bike chain, the engine drives the rear wheel via a brake drum.