Glossary “drum maximum diameter” Definition:
The largest diameter, generally 0.060 inch (1.5 mm) over originally to which a brake drum can be machined or worn before it is considered unsafe.

Glossary “drum web” Definition:
Closed side of a brake drum.

Glossary “drum brake fade” Definition:
Loss of braking efficience due to excessive heat.

Glossary “drum armature” Definition:
A generator or motor armature having its coils wound longitudinally or parallel to its axis.

Glossary “drum brake” Definition:
A type of brake in which stopping friction is created by shoes pressing against the inside of the rotating drum.