Yes we are running thru coolant.
Higher speed is what we initially thought as well.
I just discovered yesterday that when the drill is exiting the hole, the relief in the aluminum jaws holding the parts is only the diameter of the actual drill, so i think that the cap/burr that the drill is pushing out gets caught and its like a intermintant cut for the drill. This would happen on the top and the bottom hole only.
So we are going to try to mill out the relief to give that cap/burr some room to move.
Thanks for all the advice everyone. |