Tamiya 89916 4-Speed Crank Axle Gearbox (Clear) - Hobbyist Gear Demonstrator  [89916]

What the Tamiya 89916 4-Speed Crank Axle Gearbox (Clear) Shows

The Tamiya 89916 4-Speed Crank Axle Gearbox is built to reveal how gears transfer motion. With its clear casing you can easily observe gear engagement, speed steps and how changes in configuration affect output.

Transparent Construction Details

The clear body exposes the green and grey gears so you can watch their mesh and rotation. Four selectable ratios let you test different speed and torque combinations in small-scale prototypes or classroom setups.

Suitable Uses and Kit Compatibility

This gearbox is a good fit for educational projects, model experiments and Tamiya-compatible robots. Its modular nature makes it easy to adapt into a range of builds where seeing the mechanics in action helps learning.