Tamiya 89916 4-Speed Crank-Axle Gearbox Kit - Clear

Tamiya 89916 4-Speed Crank-Axle Gearbox Kit - Clear
Pololu item #: 1679 0 in stock

Price break Unit price (US$)
1 7.95
10 7.55
50 7.15

This gearbox has four possible gear ratios, including the highest gear ratio of Tamiya’s gearbox series, 5402:1. The other options are 126:1, 441:1, and 1543:1. This gearbox also features a worm gear, which locks the output shaft when the motor is not turning.

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 Description Specs (7) Pictures (8) Resources (3) FAQs (6) On the blog (0) 

General specifications

Typical operating voltage: 3 V
Gear ratio options: 126, 441, 1543, 5402 :1
Free-run motor shaft speed @ 3V: 12300 rpm1
Free-run current @ 3V: 150 mA2
Stall current @ 3V: 2100 mA
Motor shaft stall torque @ 3V: 0.5 oz·in3
Color: clear

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.