Pulley Unit Set (TAM70121)

Compact belt-driven drive system for small-scale models and robotics, the Tamiya Pulley Unit Set provides a complete belt drive with a motor, multiple pulleys, and mounting hardware. It includes seven pulleys of varying sizes, bushings for 2 mm and 3 mm shafts, a belt guide, power bands, rivets, screws, and a base with pulley mounts. Pulleys can be driven by the included motor, mounted to a compatible plate, or attached directly to shafts using the supplied bushings.

Operating at 1.5–3 V, the motor delivers about 12,300 RPM no-load at 3 V, with a stall current around 2.1 A and stall torque around 36 g-cm. The assortment of pulleys lets builders tune speed and torque for micro-models, lightweight robotics, or compact RC projects, while the belt guide helps maintain belt alignment for smooth operation. The included mounting hardware and assorted bushings support flexible configurations, including idle or driven setups that adapt to different shaft sizes.