As far as pressure is concerned, studies were found that recommended .08mm per revolution.This was also found to produce excessive heat and premature tip failure.Through testing we determined that the proper pressure would vary from one material to the next.The best pressure to use is the pressure at which the safe hardplate begins to drill.This pressure should be maintained evenly during the entire safe drilling process.

It should be noted that stopping halfway through the hole runs the risk of the bottom of the hole becoming glazed in the few revolutions prior to stopping. Restarting could then cause problems.