The Tamiya High Power Gear Box H.E. works well when extra torque is necessary. Two gear ratios are possible, and a RE-260 motor is included. Several types of crank arms are included for extra flexibility in design
With possible gear ratios of 41.7:1 and 64.8:1, the high-power gearbox is well-suited for most vehicles that require a balance of speed and torque.
The low-voltage motors in the high-power gearbox run on 1.5-4.5 volts and draw up to a few amps, making them perfect candidates for the Pololu low-voltage dual serial motor controller and 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.