Tamiya 70189 Mini Motor 4-Speed Low Speed Gearbox Kit for STEM Builds  [70189]

Tamiya 70189 Mini Motor Low Speed Gearbox Overview for Makers

This compact gearbox is built for hobbyists and educators who want a hands-on mechanical learning tool. The Tamiya 70189 Mini Motor Low Speed Gearbox provides selectable ratios and a small footprint that fits into many experimental projects.

Motor Details and Layout

Fitted with a type 030 motor, the unit is designed for low electrical draw and reduced electrical noise, helping keep power demands modest. The clear gear case makes it easy to observe gear engagement and learn how different ratios affect output speed and torque.

Four Selectable Gear Ratios

The gearbox offers four gear steps: 71.4:1, 149.9:1, 314.9:1, and 661.2:1, selectable by changing the final gear position. It includes a 3mm hex shaft and multiple fixing holes to integrate with other Tamiya craft components.

Size and Model Fit

Measuring roughly 20mm wide, 24mm tall and 30mm long, this gearbox is small enough to install in tight builds such as the 1/35 Panzerkampfwagen II Ausf. A/B/C (Sd.Kfz.121). Its compact dimensions make it versatile for classroom rigs and compact RC applications.