Tamiya 70239 42T/12T Gear Set - STEM Build Parts  [70239]

Tamiya 70239 42T/12T Gear Set for STEM and workshop projects

The Tamiya 70239 42T/12T Gear Set is a practical collection of parts for hobbyists aiming to improve STEM kits or craft bespoke mechanical assemblies. Taken from the Tamiya 70093 3-Speed Crank Axle Gearbox, these pieces give builders core components for testing gear trains and custom mechanisms.

Compatibility and Fit

The set contains two 42T/12T gears, two 38T/12T gears, a 42T final gear and a 12T pinion. Manufactured to a 0.5 module, the items are compatible with a range of Tamiya construction parts. Included bushings, shafts and small attachment pieces make it straightforward to drop these gears into existing layouts or new projects.

Practical Applications

Whether used in classroom STEM work or as spares for a custom model, this gear set delivers the flexibility hobbyists need. Its straightforward design supports smooth meshing and sensible performance for both newcomers and experienced builders.