Tamiya 70093 3-Speed Crank-Axle Gearbox Kit

Tamiya 70093 3-Speed Crank-Axle Gearbox Kit
Pololu item #: 67 91 in stock

Price break Unit price (US$)
1 6.95
10 6.59
50 6.25


backorders allowed

Tamiya’s 3-speed crank-axle gearbox looks very much like half of the twin-motor gearbox (with an added gear ratio option). This compact gearbox can be built in one of three gear ratios (17:1, 58:1, and 204:1), and is Tamiya’s cheapest, general-purpose gearbox.

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

General specifications

Typical operating voltage: 3 V
Gear ratio options: 17, 58, 204 :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: gray

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.