This produces high luster and also removes burrs. A tumbling barrel is eight sided lined with wood. Parts are packed into the barrel or drum together with slugs. Delicate parts should not shift loosely during tumbling and in some cases the parts are fixed to racks within the barrel so that they will not touch or strike against one another. Tumbling is usually used for removing fins, flashes and scales from parts. This method is also used for cleaning of forgings, stampings and castings. For deburring and for the improvement of micrometer finish, we can use this method.
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