Join Date: Sep 2007
Location: Baxter, Tennessee
They are very easy to replace. Just take out the set screws in the hand wheel and unscrew it (I think it's left handed but don't remember for sure). Then loosen the set screw on the pulley. Now you should be able to pull the shaft out from inboard side.
If the drive pulley won't come off you have a burr from the set screw. Take a drill bit that will go in the set screw hole. Touch the shaft lightly with the drill bit and turn on the drill. It won't take much to remove the burr. Then you should be able to remove the shaft and the bearings.
Replace everything, align the pulley and put the handwheel back on. Tighten up the handwheel until the spindle turns freely but there isn't any slop. Your done.
Can't tell you where to buy the bearings other than Jet. I purchased mine from my local bearing supplier. Apparently they aren't anything special or difficult to find.