School of Hard Rocks

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Thumler Model A-R2

The Thumler Model A-R2 tumbler is a 6 pound rated machine - with two 3 pound barrels. It is very nice for small batches - where small is under 3 pounds and the stones are an inch or less in size. Rough grinding is slow in this machine and I wouldn't go more coarse than 60 - 90 grit.