Thumler's Tumbler Model B Heavy-Duty 15 lb Rotary Rock Tumbler — High-Speed 3000 RPM Motor - Made in USA

The Thumler’s Tumbler Model B is a heavy-duty, commercial-grade rotary tumbler engineered for serious results. Its thermally protected 3000 RPM motor maintains steady speed under load, whether you’re tumble-polishing rocks or finishing metal parts with corn cob, walnut shell, steel shot, or other deburring media. The 15-pound capacity barrel comfortably processes about 10 lb of rocks or parts per run, while the 1/4" thick rubber liner keeps noise down in garages, classrooms, and shops. A powder-coated steel base and barrel fight rust and chipping, and the metal lid with rubber gasket helps prevent leaks during long cycles. Maintenance is straightforward: add 3-in-1 motor oil to each motor oil port as needed and use a general-purpose oil on the bearings to keep everything running smoothly. Made in the USA and built to last, Model B is a dependable choice for lapidary work, jewelry studios, reloading brass polishing, and small-batch industrial finishing. Technical Specs Motor speed: 3000 RPM (thermally protected) Capacity: 15 lb barrel (processes ~10 lb of rocks/material) Base: Metal, 8.125" high × 9.125" diameter Barrel (outer): 8.5" high × ~7" diameter Barrel liner (inner): ~8" high × ~6.5" diameter, 1/4" thick rubber Finish: Powder-coat paint Lid/Gasket: Metal lid with rubber gasket Operation: Rotary Warranty: One-Year Limited Warranty Country of Origin: USA What’s in the Box Thumler’s Tumbler Model B (steel base, high-speed motor) 15 lb metal barrel with 1/4" rubber liner Metal lid and rubber gasket User/maintenance guidance Care & Maintenance Apply 3-in-1 motor oil in each motor oil port periodically. Use general-purpose oil on the bearings as needed. Ensure lid and gasket are seated properly before operation to minimize leaks.

• Heavy-duty, commercial grade: Built for continuous rotary tumbling, polishing, and deburring; rugged steel base and barrel with powder-coat finish to resist chips and rust.
• High-speed 3000 RPM motor: Thermally protected motor delivers consistent power for rock tumbling or metal parts finishing with corn cob, walnut shell, steel shot, or other deburring media.
• Large 15 lb barrel (process ~10 lb loads): Roomy capacity for bigger batches; ideal for hobbyists, schools, labs, jewelers, reloaders, and small shops.
• Quiet, leak-resistant operation: 1/4" thick rubber liner dampens noise; metal lid with rubber gasket seals tightly to help prevent leaks during long runs.
• Easy open/close & simple upkeep: Quick-access barrel; use 3-in-1 motor oil in each oil port for the motor and general-purpose oil for bearings.
• Made in the USA: Quality components and construction designed to deliver years of dependable service.