The Tamiya 72002 high-speed gearbox can be assembled in 11.6:1 and 18:1 gear ratios. The high-efficiency gearbox is therefore suited for very fast vehicles or other fast mechanisms that do not require high torque.

The low-voltage motors in the high-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.

This gearbox has a 4 mm diameter, round output shaft, which works with the wheels that are compatible with Tamiya 4 mm, round shafts. Our 3 mm universal mounting hub also fits on the smaller threaded end of the shaft, although it is not specifically intended to work with this type of shaft (the hub’s set screw could damage the thread on the shaft).

Specifications:

• Typical operating voltage: 3 V
• Gear ratio options: 11.6, 18.0 :1
• No-load motor shaft speed @ 3V: 9400 rpm
• No-load current @ 3V: 150 mA
• Stall current @ 3V: 2700 mA
• Motor shaft stall torque @ 3V: 0.97 oz·in

Documents:

• Tamiya Gearbox Gear Ratio Comparison
• Datasheet

Warranty:

• Warranty will not apply if Product fails or is damaged after delivery to you due to accident, abuse or misuse.

Package Includes:

• 1 x Pololu 71 Tamiya 72002 High-Speed Gearbox Kit