Tamiya Double Gearbox

The Tamiya #70168 double gearbox is a compact unit with two independent motors and gear trains which is perfect to build a small-sized mobile robot. The possible gear ratio configurations are 12.7:1, 38:1, 115:1, and 344:1, giving you many options for your robot speed and torque. Although it is not typical, but it is possible to assemble each side with different gear ratios. 

 

The output shafts are 3 mm hexagonal axles that are 10 cm (about four inches) from tip to tip. The axles work with any of the Tamiya wheels to meet the robot's runway requirement.

 

The double gearbox uses two units of FA-130 (18100) motors that run on 1.5 to 3.0 volts. Please refer to the datasheet for the motor specifications.

 

The double gearbox is very similar to the Tamiya 70097 twin-motor gearbox. The gear ratio options of the two products complement each other well, but the mounting holes and overall dimensions vary slightly. The double gearbox is shorter and wider than the twin-motor gearbox, and the gears are a bit smaller and wider. This should make the double gearbox a bit more robust, though we have not heard any reports of the twin-motor gearbox gears breaking.