Two 3 pound rubber barrels, 6 pounds of total capacity, one fan cooled and overload protected motor, all assembled in the USA. The A-R2 is the Thumler's answer to the Lortone 33B and the reasoning is identical: keep a coarse grind and a polish stage running side by side, or tumble two different rock types without mixing them. Kit versions on Amazon add rough stone, four grit stages, plastic pellets and instructions.
Serious hobbyists, schools and reloaders buy this one because the motor tolerates weeks of continuous duty and the faceted barrels cut fast. It is louder than a single barrel machine simply because two drums are turning, and it needs a stable bench, not a wobbly shelf. Both barrels share one speed, and a worn belt stops the whole batch, so keep spares in the drawer.
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