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brake drum definition

brake drum

  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
  2. any rim that rotates rapidly in a braking assembly

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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