Definition of tumbling barrel in English:

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tumbling barrel

Pronunciation: /ˌtəmb(ə)liNG ˈberəl/
(also tumbling box)

noun

A revolving device containing an abrasive substance, in which castings, gemstones, or other hard objects can be cleaned and polished by friction.
Example sentences
  • In tumbling barrels, the friction is created by gravity as the media slides across the diameter of the barrel.
  • To tumble stones: place rough rocks or minerals in the tumbling barrel, add a rough grit, and turn on the motor.
  • These are complete Lortone tumbling barrels including the barrel, inner lid with liner, and the outer lid with knurled nut.

For editors and proofreaders

Syllabification: tum·bling bar·rel

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