The Tamiya 72005 6-speed gearbox is a versatile, high-efficiency gearbox that you can build in one of the following gear ratios: 11.6:1, 29.8:1, 76.5:1, 196.7:1, 505.9:1, and 1300.9:1. Whatever your application, chances are that one of the configurations will do the job. A clutch gear protects the gearbox in high-gear-ratio configurations so that the gearbox does not rip itself apart if the output shaft gets stuck.
The low-voltage motors in the 6-speed gearbox run on 1.5-4.5 volts and draw up to a few amps, making them perfect candidates for the DRV8833 motor driver carrier. 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.
Typical operating voltage : 3 V
Gear ratio options : 11.6, 29.8, 76.5, 196.7,
505.9, 1300.9 : 1
Free-run motor shaft speed @ 3V : 9400 rpm1
Free-run current @ 3V : 150 mA2
Stall current @ 3V : 2700 mA
Motor shaft stall torque @ 3V : 0.97 oz·in3