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This is a 2 lb rock tumbler built around a belt-free direct-drive motor instead of a belt, which removes the usual belt wear and slipping. A PC noise cover and TPU drum cut sound to a claimed 35 dB or less, so it can run indoors without dominating a room. A 1–9 day timer and four speeds from 75 to 120 RPM cover coarse grinding through polish, and overload protection plus power-loss memory resume a cycle after an interruption. The kit ships with eight stone types, grit, micro diamond powder, polish, strainer, shaker ball, rings, cords and adapters, so a beginner can start without buying supplies separately. Against belt-driven rivals it trades a little raw torque for quieter, lower-maintenance running.
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Lowest price we've seen: $50.31 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
This rock tumbler polishes rough stones into smooth, shiny gems. It has a 2 lb (0.91 kg) drum, so it can handle more stones in one batch and cut down on reloading.
A belt-free direct-drive motor turns the drum smoothly and steadily. The low-voltage design means less belt-related maintenance. A PC noise cover, a TPU drum and the direct-drive motor work together to reduce noise, vibration and friction, and operation is rated at 35 dB or less.
A 1–9 day timer and 4 speeds from 75 to 120 RPM suit different materials and polishing stages. The constant-speed design keeps polishing even. Overload and power-loss memory functions resume an interrupted cycle.
