Actually, with deep boring aluminum, with a less that ideal bar I have found more favourable results using a larger tip radius. It tends to help load up the tool and keep it in a constant state of flex as opposed to being light and able to flex (vibrate) back and forth.
I am not familiar with Ultra-Dex is it carbide or heavy metal? If not that may be your first problem.
__________________
www.integratedmechanical.ca |