Patent ID: 6019553
Filing Date: 2000-02-01
Classification: B23B,Y10T

Abstract:
A metal cutting drill comprising:a drill body including a shank and a head disposed at forward end of the shank, a passageway extending longitudinally forwardly through the shank and connected to a pair of throats extending rearwardly from a front face of the head, and a recess formed in the front face, the recess overlapping a longitudinal axis of the drill body; andan insert formed of a harder material than the drill body, the insert brazed in the recess and including a plurality of radially spaced-apart cutting edges disposed on opposite sides of the axis and situated circumferentially behind respective ones of the throats, the cutting edges forming between one another a gap spaced radially from the longitudinal axis, the cutting edges overlapping each other radially during a drilling operation, one of the cutting edges projecting radially outwardly beyond a side face of the head, and another of the cutting edges terminating radially inwardly of the side face a forward most point of each cutting edge being spaced from the axis, the cutting edges including cutting edges extending generally parallel to one another.