Tamiya 89916 4-Speed Crank Axle Gearbox (Clear) - Educational Gearbox Kit  [89916]

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

The Tamiya 89916 4-Speed Crank Axle Gearbox gives hobbyists and students a clear view of gear motion. Its see-through casing helps you follow how gears interact, making it a useful teaching aid for mechanical principles and project experimentation.

Visible Gear Layout

The clear housing exposes the green and gray gears so you can watch meshing, direction changes and speed transitions. With four selectable speeds, the gearbox supplies a range of outputs suitable for small robots, model vehicles or classroom demonstrations.

Use in STEM Builds

Designed to pair with Tamiya construction and robotics kits, this gearbox provides practical experience with gear trains and power transfer. It is a compact, modular part that fits into many educational and hobby projects.