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Tamiya 72001 Planetary DC Motor Gearbox




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BR772001 16.49
Motor: RE260, Nominal 3V, Max 4.5V, Nominal Current 1A.

Free Running Speed : 10500 RPM

Stall Torque : 15gcm

Ratio 4:1 5:1 16:1 20:1 25:1 80:1 100:1 400:1
Torque - gcm 60 75 240 300 375 1200 1500 6000

The first in Tamiya's "high efficiency" series, the planetary gearbox features two 4:1 and two 5:1 stages that can be combined in any way you like--you can even combine two kits to get really huge gear ratios. The output is always conveniently on the same axis as the motor shaft. Available gear ratios are 4:1, 5:1, 16:1, 20:1, 25:1, 80:1, 100:1, and 400:1.

The motor is rated for 3 volts but will typically work fine up to 6 volts. When using this product with the dual serial motor controller (or any motor driver based on an H-bridge), keep in mind that up to a few volts (depending on the load) are lost on the transistors of the H-bridge, so that a 4.5 volt battery delivers about 3 volts to the motors, giving them a reasonable amount of power. Motor overheating can be caused by excessive stalling, even at very low voltages. We recommend that you use stall-detection sensors, or just watch your robot, to make sure that it doesn't stall for more than a few seconds at a time.

The 5mm, round output shaft is compatible only with Tamiya's sports tire set and narrow tire set.

Note: The planetary gearbox is a kit; assembly is required. To use the kit in robotics projects, you need to connect the motors to your own robot controller. Click here to compare these gearboxes.


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Last modified: October 02, 2004