Tamiya 89917 Clear Single Gearbox Educational Gear Unit  [89917]

Transparent single gearbox overview

The Tamiya 89917 Single Gearbox is designed for observing basic gear mechanics in a compact, demonstrable format. Its clear casing allows users to watch gear trains in motion, making it useful for understanding ratio changes and drive behaviour in practical sessions.

See gears in action

The clear enclosure reveals internal gearing so you can track movement and check mesh quality during assembly. This visibility is valuable for learning and for verifying setups in custom models or test rigs.

Suitability and project fit

The gearbox works with a wide set of Tamiya parts and can be used to enhance existing models or to build focused educational projects. The straightforward construction helps newcomers get started while offering meaningful insight to experienced hobbyists.