One way to get "on center" is to measure from the 12 0'clock position of your part down to the tip of your cutter. When this measurement = radius, you are on center. I use the "depth rod" on my calipers.
Wayne
I need the mentioned bolt w/06 bolt face. I have a friend that needs one for a 721 with a broken extractor. Anyone have a takeoff for sale?
Thanks
Wayne