Tamiya 89914 3-Speed Crank-Axle Gearbox Kit - Clear

Pololu item #: 1681
Brand: Tamiya

This product has been discontinued.

This gearbox is now only available in gray.

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.

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

Note: This gearbox is now only available in gray.

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

Complementary products

The output shafts included in this kit are 3 mm hexagonal axles that are 10 cm (about four inches) from tip to tip. The axles work with any of the Tamiya wheels we carry, giving you many options for your robot speed. The low-voltage motors run on 3-6 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. 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. For motor specs, see the Mabuchi motor FA-130 (#18100) data sheet (58k pdf).

Note that you can replace the motor in this kit with a lower-current, higher-voltage motor if you want to use this gearbox with controllers such as the qik 2s9v1 dual serial motor controller, TB6612FNG dual motor driver carrier, or Baby Orangutan B-328 robot controller.

To compare all Tamiya gear box kits, see the Tamiya Gearbox Gear Ratio Comparison.

Note: The 3-speed crank-axle 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.

People often buy this product together with:

Tamiya 70093 3-Speed Crank-Axle Gearbox Kit Tamiya 70093 3-Speed Crank-Axle Gearbox Kit
Tamiya 70105 3mm Diameter Shaft Set Tamiya 70105 3mm Diameter Shaft Set
Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack) Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack)

Related Products

Tamiya 70093 3-Speed Crank-Axle Gearbox Kit

Related Categories

Tamiya Gearboxes with 3mm Hexagonal Shafts
Tamiya Motors and Gearboxes
Tamiya Wheels
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