Tamiya 69909 Clear 3-Speed Crank Axle Gearbox Educational Edition  [69909]

Clear Crank Axle Gearbox Tamiya 69909 for Projects

This transparent 3-speed gearbox is aimed at hobbyists and educators who want to study moving parts in real time. The three selectable ratios make it useful for testing different drivetrain behaviours across model and robotics applications.

Design and Teaching Value

The clear ABS case lets you watch the internal gear train as it rotates, which is helpful for demonstrations and learning. Both left and right 3mm hex output shafts are provided so the gearbox can drive a variety of linkages and assemblies.

Motor Fitment and Uses

Paired with a Type 130 motor, the gearbox supplies dependable torque for classroom robots, prototype mechanisms, and creative model projects. The crank arms attach easily to create oscillating motion or drive simple machines.