Tumbling

Tumble finishing, also known as tumbling or rumbling,  which is a technique for smoothing and polishing a rough surface on relatively small parts, a similar process called barreling, or barrel finishing.

Metal tumbling is used to burnish ,deburr, clean, radius, de-flash, descale, remove rust, polish, brighten, surface harden , prepare parts for further finishing, and break off die cast runners.