What do a.m. and p.m. stand for?

brake drum

a narrow metal cylinder, fixed to a rotating shaft or wheel, against which brake shoes or brake bands act.
Origin of brake drum
1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for brake drum
  • If a brake drum or rotor is severely worn, replacement is required.
  • When the brakes are applied, the shoes are pushed outward against the inside of the cylindrical brake drum.
  • Some brake dust can be seen when a brake drum is removed from a car, truck, or other equipment.
  • The brake drum was removed and the wear surfaces of the drum and linings were visually inspected.
  • Brakes are designed so brake shoes or pads rub against the brake drum or disks to slow the vehicle.
  • On this type of truck when the operator depresses the pedal, the cable pulls on a lever inside the brake drum.
  • The other five brake drum friction surfaces were clean and dry.
  • The brake lining failed and was torn away from the brake drum.
  • Premature wear of the brake drum would decrease effective braking ability, increasing the risk of a vehicle crash.
  • The brake drum, pads and shoes which are replaced may be purchased by the dealer using a reseller permit.
British Dictionary definitions for brake drum

brake drum

the cast-iron drum attached to the hub of a wheel of a motor vehicle fitted with drum brakes See also brake shoe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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