Rock Tumbler Kit, Belt-Free, 4-Speed, 1–9 Day Timer

Rock tumbler kit delivers quiet, consistent stone polishing with a belt-free direct-drive motor, so you can turn rough rocks into smooth, glossy keepsakes with less maintenance. Designed for adults and kids, it combines low-noise operation (≤35 dB), precise speed control, and a 1–9 day timer to match different materials and polishing stages. Overload protection and power-off memory help keep cycles on track, even after outages.

• Delivers belt-free direct-drive performance to reduce wear, upkeep, and downtime compared with belt-driven tumblers


• Runs at ≤35 dB for low-noise rock polishing that fits home crafting, classrooms, and shared spaces


• Adjusts 4 speeds (75–120 RPM) plus a 1–9 day timer for controlled tumbling through multiple polishing stages


• Includes overload protection and power-off memory to resume the remaining cycle after an interruption


• Holds up to 4 lbs in the heavy-load barrel to polish more stones per batch and cut refill frequency

Create polished stones for displays, jewelry projects, or hands-on STEM activities with a stone polishing kit built for beginners and enthusiasts. The constant-speed design supports more uniform results, while the simple controls make setup straightforward for parent-child projects and weekend makers. Note: rough stones are not included and must be prepared separately. Grab yours today and start transforming raw material into smooth, rounded gems.

• Motor: Low-voltage direct-drive; belt-free design


• Noise level: ≤35 dB


• Timer: 1–9 days


• Speed settings: 4 levels, 75–120 RPM


• Barrel capacity: 4 lbs


• Protections: Overload protection; power-off memory


• Product size (without barrel): 7.01 x 9.06 x 3.94 in (178 x 230 x 100 mm)


• Product size (with barrel): 7.01 x 9.06 x 8.27 in (178 x 230 x 210 mm)


• Net weight: 7.72 lbs (3.50 kg)