The Tamiya 89918 Double Gearbox (Clear) is a compact gearbox designed for learning and experimentation. Its clear housing makes internal gear movement visible, providing a practical way to investigate mechanical principles and drivetrain behaviour.
With visible gearing, users can monitor tooth engagement, observe differences in rotational speed across stages, and study how gear selection alters torque and output speed. The layout supports hands-on experiments and stepwise learning.
Suitable for educational models, small robots, and construction kits, this gearbox is compatible with many Tamiya parts. It offers a reliable platform for demonstrating gear ratios and mechanical advantage in workshops and hobby sessions.
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