[Jason Kixmiller]

There will be many people that will probably strongly discourage you from running a sprocket directly off the CIM output shaft...if the large motors are like the smaller version, they do not respond well to any type of side load. Basically, the motor will perform much better (if at all) if it either has a support at the end of the shaft or is run through a simple transmission. Posted by Al Skierkiewicz in a post referring to running a sprocket from the output shaft of a smaller CIM: "I agree with Chris but must remind you that the side load on the Chalupa shaft must be minimum. The bearing at that point is very small. If you just add a sprocket to the output shaft you are asking for problems, failure is guaranteed." I don't know if this is in fact the case with these motors, so I am hoping that someone with more mechanical knowledge of these motors will respond.

With that being said, there is a pretty easy way to fit any sprocket - just buy one with a smaller hole and drill the hole out to the size that you need. You can either put the sprocket in a lathe and turn out the hole or buy a drill bit that is as close to your size as possible.

In either case, good luck and be safe.