The Thumler's Tumbler A-R12 is a heavy-duty rotary rock tumbler built around a 12 lb. hexagonal rubber barrel. Its fan-cooled motor is rated for continuous duty and has overload protection, so it can run for days while polishing stones or brass cases. The rubber barrel keeps noise down compared with plastic or metal drums. It suits serious rock hobbyists and reloaders who polish brass in bulk, and it is a step up in capacity and durability from small hobby tumblers.
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Owners of the A-R series describe it as a rugged, long-running machine that holds up to continuous use. Reloaders value the large barrel for brass, while rock hobbyists note it is heavy and slower than vibratory tumblers.
The Thumler's Tumbler A-R12 is a rock tumbler made in the USA. It has a large hexagon-shaped rubber barrel with a 12 lb. capacity. It is built for quiet, efficient operation.
The motor is fan-cooled and rated for continuous duty, with overload protection. The tumbler suits serious rock hobbyists. It can also be used as a case polisher for handloaded ammunition.
