brake drum
Noun
Meaning
a hollow cast iron cylinder attached to the wheel that forms part of the brakes
Source: WordNetSynonyms
Hypernyms
Examples
Brake drum The brake drum is generally made of a special type of cast iron that is heat-conductive and wear-resistant.
Current design theory is to use shoes for the proper diameter drum, and to simply replace the brake drum when necessary, rather than re-arcing shoes.
Machining the friction surface of a brake drum increases the diameter, which might require oversized shoes to maintain proper contact with the drum.
Shimano Nexus front hub with roller brake The brake drum itself is frequently made of cast iron, though some vehicles have used aluminum drums, particularly for front-wheel applications.
Usually it is only necessary to machine away the ridge that forms that makes brake drum removal difficult.