Tamiya 70186 Underwater Gearbox Educational Pack  [70186]

Overview of the Underwater Gearbox

The Tamiya 70186 Underwater Gearbox Set gives hobbyists and students a practical way to explore mechanical systems. With simple assembly it helps users test how motion is generated and controlled in compact underwater devices. The parts are suited to making swimmer units and amphibious experiments.

Core Components and Teaching Value

Included in the kit is a Submarine Motor Mini (High Speed Type) with a gear ratio of 28.9:1. An attachment plate is supplied so you can fix the gearbox to foam board (sold separately) with screws, making it handy for model hulls and classroom builds. The gearbox is powered by a single R03/AAA/UM4 battery (not included), and its clear mechanical design supports step by step investigation of gearing and propulsion.

Project Suggestions and Integration

From solo hobby builds to group classroom projects, the Tamiya 70186 Underwater Gearbox Set slots into a variety of designs. It integrates well with other Tamiya components so you can extend projects into more complex machines or combined systems.