Drilling apparatus and method

摘要

The invention provides a drilling apparatus and method for drilling a hole in a workpiece. The drilling apparatus includes means for rotating a drill bit and means for advancing the rotating drill bit into a workpiece to a first depth. The drilling apparatus further includes means for dwelling the drill bit within the workpiece at the first depth for a dwell time and means for further advancing the rotating bit to a second depth after the dwell time has expired. The drilling method includes rotating a drill bit and advancing the rotating drill bit into the workpiece to a first depth. The method farther includes dwelling the drill bit within the workpiece at the first depth for a dwell time and further advancing the rotating bit to a second depth after the dwell time has expired.