Tumble finishing, also known as tumble polishing or barrel finishing, is a mechanical process used to smooth, polish, and deburr metal, plastic, or ceramic parts. This technique involves placing the parts along with abrasive media (such as ceramic beads, plastic pellets, or other types of abrasives) into a rotating barrel or tumbler. As the barrel rotates, the media and parts tumble together, resulting in friction and abrasion that smooths the surfaces of the parts.

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