I am loading a 21/32 inch drill into an ER32 collet, and the only drill I have available had most of the shank ground down to a half inch. I don't have any half inch collets available, so I'm trying to clamp onto what's left of the shank. I have about a .625" length of full diameter shank left. Is 5/8" long enough to hold a 21/32" drill reliably? I am using it in a lathe on 1018 steel, drilling about 3" deep.