Description

3-Speed Crank Axle Gearbox (Clear)
Item No89914
Tamiya Limited Edition Product

This reliable gearbox features three selectable gear ratios to cover both high-rpm and high-torque applications. The attachment of crank arms further increases usage possibilities.

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.

Overview
The Tamiya 3-speed crank-axle gearbox is essentially half of the twin-motor gearbox. The kit comes with enough parts so you can built the gearbox in any of three gear ratios (17:1, 58:1, and 204:1).

Color options
#70093 3-speed crank-axle gearbox — This gearbox is solid gray and comes packaged in a box.
#89914 3-speed crank-axle gearbox — This gearbox is clear and comes packaged in plastic bag.

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.

Tamiya 89914 Assembly Manual :

Tamiya Educational Robot Construction Series Catalog :