Tamiya 72009 - Compact 5-Speed Twin Gearbox H.E. STEM Kit  [72009]

Tamiya 72009 - 5-Speed Twin Gearbox H.E.
Price:
CAD$20.65CAD$27.85
Brand:
Tamiya
Model:
72009
GTIN:
4950344720095
Condition:
Brand New
Available in warehouse
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Tamiya 72009 - 5-Speed Twin Gearbox H.E. overview

The Tamiya 72009 5-Speed Twin Gearbox H.E. is a hands-on kit aimed at hobbyists building small robots and mechanical models. The unit provides five selectable gear ratios - 6.1:1, 15.6:1, 40.2:1, 103.3:1 and 265.6:1 - achieved by changing gear combinations and shaft positions to study speed versus torque tradeoffs.

Layout and key characteristics

This twin gearbox has separate left and right sections that snap together for flexible assembly. Each side offers five mounting parts, each with three holes, for varied attachment setups. Clutch gears are fitted for the 103.3:1 and 265.6:1 ratios to reduce overload risk and extend service life.

How to use and motor options

Hex hubs allow fitting cruciform crank arms and R/C wheels, making the gearbox suitable for drivetrains and mechanism experiments. The kit includes two Type 260 motors and also supports Type 130 and Type 140 motors, giving builders options for different speed and torque goals.

Specifications

  • Length: 88.7mm
  • Width: 86mm
  • Height: 27mm (connected)
  • Weight: 140g (with gear ratio of 265.6:1)

Which kinds of student projects suit this gearbox?

It works well for classroom robotics, small geartrain demonstrations and mechanical prototypes where learners need to test different speed and torque setups.

Is the gearbox safe for higher torque tasks?

The clutch gears in the two highest ratios help protect the train from overload, making it appropriate for moderate torque testing but not heavy industrial loads.

Can I swap motors easily?

Yes. The kit ships with two Type 260 motors and is compatible with Type 130 and Type 140 motors, so you can change motors to tune RPM and torque for your build.

What mounting options are available?

Each side has five mounting parts with three holes each, giving multiple mounting orientations for frames, wheels or linkages commonly used in RC and robotics projects.

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