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The Thumler's A-R1 is a small rotary rock tumbler with a 1-quart rubber barrel that holds about 3 lbs of rock. Its continuous-duty, impedance-protected motor is built for long runs, and the unit is made in the USA. It ships as a starter kit with four grades of abrasive, a pound of rough rock, jewelry findings and an instruction booklet. Compared with cheap toy tumblers, it is slower and smaller than multi-barrel hobby machines but far more durable; hobbyists rate it as a reliable entry point for polishing stones, coins and brass.
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Lowest price we've seen: $171.84 on Nov 13 at FindingKing. Tracked across 4 stores since Nov 13.
Owners of the A-R1 generally praise its sturdy build and quiet rubber barrel, and many report years of service. The main complaints are the small batch size and the slow, sequential grit stages of a single-barrel machine.
The Thumler's Tumbler A-R1 is a rotary rock tumbler for polishing rocks and stones. Rotary tumblers also polish coins and brass and other metals, and they clean cartridges. They are used for tumbling and mixing jobs by hobbyists, laboratories, schools and industry.
The tumbler has a continuous duty motor with impedance protection. It is made in the U.S.A. It runs on 110V, 60Hz power.
The 1 quart rubber barrel holds 3 lbs of rocks. Polished stones can be used to make jewelry. The kit includes abrasives, tumbling rock, jewelry findings and an instruction booklet.
