72002 High Speed Gear Box

Price:
US$18.84
799-72002
Delivery within 1-2 weeks
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The 799-72002 is an High Speed Gear Box and is perfect for high speed applications.

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 Pololu low-voltage dual serial motor controller and the DRV8833 motor driver carrier (2130-POLOLU). 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.

For motor specs, see the Mabuchi motor RE-260 (#2295) data sheet (59k pdf). 

Note: The high-speed 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.

General specifications

Typical operating voltage: 3 V
Gear ratio options: 11.6, 18.0 :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

Notes:

1- A theoretical speed of the gearbox output shaft can be computed by dividing this speed by the gear ratio.
2- This is the no-load current of the motor when disconnected from the gears in the gearbox; the no-load current of the entire gearbox with the motor connected will be slightly higher and will vary depending on the gear ratio.
3- A theoretical torque of the gearbox output shaft can be computed by multiplying this torque by the gear ratio.