The Tamiya 72007 4-Speed High-Power Gearbox kit includes one brushed DC motor and all the gears and parts to build any of the four possible gear ratio configurations: 39.6:1, 47.6:1, 61.7:1, 74:1. The four gear ratio options give you the flexibility to choose the best speed and torque for your project.

Features
Gear ratio can be easily adjusted by changing the motor pinion (10T, 12T), spur gear position, and altering the middle and final gear attachment position
4mm dia. threaded driveshaft included
Gearbox is compatible with other Education Construction items
Type 260 motor included - RPM: 5040-6300, Voltage: 1.5V Recommended
Separately available 130 and 140 motors can also be attached with the included adapter
Two 12mm hex wheel hubs included
H.E. denotes High Efficiency
Pictorial instructions included

Ratios: 39.6:1, 47.6:1, 61.7:1, 74:1
Free-run motor shaft speed @ 3V: 9400 rpm
Free-run current @ 3V: 150 mA
Stall current @ 3V: 2700 mA
Motor shaft stall torque @ 3V: 0.97 oz-in
Length: 2.71" (69mm)
Width: 1.25" (32mm)
Height: 1.1" (28mm)