Mini Motor Multi Ratio Gearbox 12-Speed

works great i like the fact you can move the one gear into different spots to change the gear ratio, cool way to learn about gear ratios and its effects, make sure you follow the pictures exactly and in correct order, also dont tighten the top lid where you need to use a screw too tight otherwise it will crack a bit like it did for me, but still works mainly visual.

Product arrived in good time and perfect condition. The product was used to add mobility to a 3D printed robot.

It's okay. powerful for its size, and i like you can change the gear ratios. BUT, i have ordered 2 of these, and both times the wires pulled out of the motor, and it's impossible to solder them back on because the points on the motor are so small. AND, it has very low torque. The electric motor itself is strong, but it doesn't hold power through all the gears (plastic). So ordered a Uxcell gearbox, (a lot of torque, which is what i need)

Another sample of the quality that Tamiya puts in his product. Ideal for hobbyist

This kit was basically the only one I could find that would allow me to use the motor & gear ratios to make a display model for one of our products. Took a bit of trial and error to get the correct number of rotations but works well. Initially I just paired a small model motor with 2 AA batteries but that caused the batteries to heat up and they didn't last long.

It was very easy to assemble the product using the provided diagrams. It is now powering a variety of silly cars we make with an Erector set with my son.

Excellent product - performs just as designed - bought this to run a marble machine - diagrams rather than words - since it is imported - that is probably best

noisy and not enough torque. the whole thing is flimsy