Thumler's Tumbler Model A-R2 Double Barrel Rotary Tumble Burs Bulk Discount the second number is the

the second number is the distance between lines:

hardened metal such as knife edges

Hardness of 72 HRc — the hardest steel file available

Optional modular odor and fume cartridge filters are available separately and will reduce suction capacity — use only if odor or fume elimination is required

Thumler's Tumbler Model A-R2 Double Barrel Rotary Tumble Burs Bulk Discount the second number is theThe Thumler's Tumbler Model A R2 is a continuous duty double barrel rotary tumbler built for long, unattended runs. Each molded rubber barrel holds up to 3 lb, giving you 6 lb of total processing capacity across two independent batches. Suited for jewelry burnishing with steel shot, cut down work with plastic or ceramic media, or staged lapidary grinding and polishing, the A R2 delivers uniform, repeatable results with quiet operation. Manufactured in