I have a 10" atlas lathe. Today I needed to chuck up a bolt in my 4 jaw chuck and part the end off. The jaws were in the wrong way so insted of twisting my wrist off I used a 3/8 air ratchet with an adapter to 1/4 and a 3" extension. It worked great and made the whole job much easier. Just thought I'd check with you guys and see if doing this is a bad idea or not. Can't see what it would hurt but it never hurts to ask.