brake drumbrake drum
- 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
- any rim that rotates rapidly in a braking assembly
A metal cylinder to which pressure is applied by a braking mechanism in order to arrest rotation of the wheel or shaft to which the cylinder is attached.
(plural brake drums)