Thumler's Tumbler Model A-R1 Small Rotary Tumbler 110V or 220V

The Thumler's Tumbler Model A-R1 is a compact, continuous-duty rotary tumbler designed for jewelry, metalsmithing, and lapidary work. Its molded rubber barrel holds a 3 lb total load and runs quietly through extended cycles — burnishing, deburring, or cutting down surfaces with consistent, unattended operation. Available in 110V or 220V (both with a North American style plug). Made in the USA by Tru-Square Metal Products. Manufacturer stock no. 103.

Features

• Available in 110V or 220V — both supplied with a North American style plug
• Continuous-duty motor supports long, unattended runs
• Molded rubber barrel cushions parts and reduces operating noise
• Versatile finishing: burnish with steel shot or cut down with plastic or ceramic media
• Also suitable for lapidary rock tumbling with silicon carbide and cerium oxide
• Made in the USA

Specifications

Available Options

Notes

• Do not exceed the 3 lb total load (media + parts + liquid combined).
• The 220V model includes a North American style plug — verify that your location supplies 220V power before ordering.
• Rinse media and barrel thoroughly after use to prevent grit carryover when switching between finishing processes.
• Burnishing: Fill with stainless steel shot, water, and a small amount of burnishing compound and run for several hours to work-harden and brighten surfaces.
• Cut-Down: Use plastic or ceramic media with a detergent compound for more aggressive surface refinement.
• Lapidary: Run progressive stages with silicon carbide grits, then finish with cerium oxide.
• Rotary tumbling is the slowest mass-finishing method and is not ideal for final polishing of broad, flat surfaces.