Tamiya 70110 4-Speed Crank Axle Gearbox Kit - STEM Workshop Gearbox  [70110]

Tamiya 70110 4-Speed Crank Axle Gearbox for STEM Projects

The Tamiya 70110 4-Speed Crank Axle Gearbox is a practical component for hobbyists and educators exploring mechanical systems and robotics. This gearbox provides four selectable ratios so users can compare torque and speed in real projects.

Compact layout and selectable ratios

The unit has a compact footprint that fits into many small builds. With gear ratios of 126:1, 441:1, 1543.5:1, and 5402:1, builders can dial in performance for different tasks. Two crank arms are included to expand mounting and motion options in experimental setups.

Where to use this gearbox

Suitable for beginners and more experienced model makers, the Tamiya 70110 gearbox is often used in classroom demonstrations to illustrate gear trains and motor behavior. It also works well with other Tamiya construction kits for hands-on learning about gearing and mechanical advantage.