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Hey guys, silly question but can anyone tell me how to lock the chuck spindle to remove jaws from chuck? I work with a mazak nexus 200 ll quick turn 2 axis and for the life of me i cant get it to lock. Its a 3 jaw chuck with bolts that screw to it. I noticed that the previous operator bypassed a lot of things including having the machine working with the door open which i find unsafe. I would also like to know how to get rid of all the bypasses he made. Obviously i only know of the door now but am wondering if thathas something to do with the jaws not locking.