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Tamiya 89916 4-Speed Crank-Axle Gearbox Kit - Clear
 
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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.
Compare all products in Tamiya Motors and Gearboxes or 3mm Shaft Gearmotors or Tamiya Gearboxes with 3mm Hexagonal Shafts.
| Description | Specifications (7) | Pictures (8) | Resources (3) | FAQs (6) |
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Documentation and other information
Tamiya Gearbox Gear Ratio Comparison
Table comparing the gear ratios available in the many different Tamiya gearboxes we carry.
Tamiya “Toy” Motor Testing by Adam Borrell (a.k.a nexisnet)
(Printable PDF: tamiya_toy_testing.pdf)
Adam, who posts under the username nexisnet on the Pololu forums, has performed a detailed series of experiments to determine how operating voltage affects the lifetime of the Mabuchi FA-130 motor, which happens to be the motors used in the Tamiya 70168 Double Gearbox, 70167 Single Gearbox (4-Speed), 70097 Twin-Motor Gearbox, 70093 3-Speed Crank-Axle Gearbox, 70110 4-Speed Crank-Axle Gearbox, and 70103 Universal Gearbox.
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