We are trying to make a part of beryllium copper that has a .025" square pin on one side. The length of the square pin is .140" long, then transitions to a diameter of .035”, and then to a shoulder at .150” diameter. The problem I am having is that we have to turn the raw material down to .035" before we polygon mill the .025" square. We’ve done polygon milling on much larger parts but this is our first time on a small part. We are using a CNC Swiss lathe that has opposing X- and-Y-axis gang plates that are controlled separately.