Selectable Gear Box (One Touch Selector)

A great Science Fair project item!

If you need speed variations, then look no further. 

Drive pulleys, cars, wheels or fans with high torque or speed.

Adjustable mounting brackets allow for flexibility in project application.

With one touch of the slide switch, three gear ratios are possible: 6.8:1, 45.97:1, 310.74:1 or 17.68:1, 119.52:1, 807-93:1

Selectable Gear Box