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Tumble finishing

Small rock tumbler with the barrel in place, ready to rotate
Parts breakdown

Tumble finishing, also known as tumbling or rumbling,[1] is a technique for smoothing and polishing a rough surface on relatively small parts. In the field of metalworking, a similar process called barreling, or barrel finishing,[2] works upon the same principles.

Tumbled stones are made with rock tumblers in a process very similar to the natural processes that produce "sea glass" or "beach glass".

  1. ^ Kopecki, E. S. (1973), Cleaning stainless steel, ASTM International, p. 126.
  2. ^ Degarmo, p. 781.

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