Check your supply voltage before powering on. This product is available in both 110V / 120V and 220V / 240V versions. Using the wrong supply can damage the unit and voids any warranty the equipment may have. Select your voltage option above, then confirm the notice below updates before purchase.
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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
Model
Thumler's Tumbler A-R1
Barrel Capacity
3 lb (1.35 kg) total load including media and workpieces
Barrel Outside Diameter
5 in (127 mm)
Dimensions (D × H × W)
8-1/2 in × 7-1/2 in × 6 in (216 × 190 × 152 mm)
Duty Cycle
Continuous operation
Manufacturer No.
103 (A-R1)
Country of Origin
USA
Available Options
Part #
Voltage
147.781
110V
147.781X
220V
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.
