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. A clutch gear prevents the
gearbox from destroying itself in case the output shaft gets stuck.
The motor is rated for 3 volts but will typically work
fine up to 6 volts. When using this product with the dual serial motor
controller (or any motor driver based on an H-bridge), keep in mind that up to a
few volts (depending on the load) are lost on the transistors of the H-bridge,
so that a 4.5 volt battery delivers about 3 volts to the motors, giving them a reasonable
amount of power. 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.
The 3mm, hexagonal output shaft is compatible with all
four types of Tamiya
The 4-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. Motor is FA130, 3V (Max 4.5V)/0.5A, 10500
RPM. Click here
to compare these gearboxes.