You make 'em, you don't buy them....
Mark Goodall - ATL - tooljunkie
>From what I know about jack shafts.... you make them from various components, including 1 steel rod, 2 pillow bearings, 2 sprockets,gears or pullies.
The jack shafts I built were for go carts and mini bike, but the principle is the same no matter what the application.
Instead of having the sprocket (or pully) on the engine (or motor) drive one chain (or belt) that connects directly to the sprocket (or pulley) on the wheel....
You have have the engine sprocket and chain drive a sprocket on and additional shaf located between the engine and the wheel. Then on that same shaft you have another sproeckt with another chain that goes to the wheel.
IF you have a larger drill press you can see this in action.... it's the middle idler pulley located in between the front and rear pullies in the drill press.
I looked for a picture that shows it better than I can describe it, but couldn't find a photo.
Happy Woodworking!