Originally Posted by Vern Smith  ..... When I stomp on the foot pedal and the chuck closes I don't always have the bar (6061) positioned on dead center. The result is that 2 of the jaws like to capture the bar on the way closed and scar it up in the closing process. I'm sure this will not be a problem when feeding the bar through a spindle liner but what do you do when you are putting slugs into the jaws from the front?....Vern |
You can minimize or even avoid this happening if you bore the jaws when they are almost at the limit of their open travel. This way when you open them after boring they only move a small distance so there is not enough room for the bar to wedge between two jaws. Couple this with boring them out so the entire width of the jaw is involved in the grip and they behave much like a collet.