[DonRotolo]

Those are gears. not sprockets.

Definitely shield the pinch point where the gears mesh. A think sheet of lexan will suffice.

I can't say about the edge, if it is sharp, how easily it can be touched, etc., but again a thin sheet of plastic cut in a ring that sits just above the gear teeth but hangs over them maybe an inch should be pretty good. As the wise Eric H wrote, bring materials to make shields should the need arise.