Below is a list of Parts Tumbler manufacturers from Middletown, Connecticut. Parts tumblers are used for the finishing, polishing and deburring of both plastic and metal parts. There are two main types of parts tumblers: rotary tumblers and vibratory tumblers. Able to remove burrs, rust, slag, scale and other undesired materials on the parts, parts tumblers can be used for small and fragile parts as well as large and bulky parts.