I have no idea why or how this happened. Maybe I fed a board into the planer before the previous board was out. I don't know. But here is the story. I realized the boards were not feeding into the planer, and then I noticed the chain that turns the rollers hanging down. The chain had broken at the master link, and so I purchased another and put it back together only to notice that several of the teeth on the outfeed roller sprocket had broken off. I tried to turn the outfeed sprocket with channel locks, and it absolutely will not turn. I have no idea why or where I could find a replacement sprocket if I could figure out why it will no turn. Anyone out there an expert on this machine?