Drill bit

Abstract

A drill bit (100) having a longitudinal axis (101) and to be rotated about the axis (101) in a drilling direction (102) to perform a drilling operation. The drill bit (100) comprises a body (120) having a longitudinal length with a proximal end (121) and a distal end (122). The body (120) has a diameter. A tapered tip (110) extends from the proximal end (121) and terminates in an apex (111) at an end of the drill bit (100). The drill bit (100) also comprises a plurality of flutes (140) with each flute (140) extending helically along the body (120) into the tip (110). The drill bit (100) also comprises a land (150) between each of the flutes (140) and extends to the tip (110). The drill bit (100) also comprises a plurality of tip faces (190) on the tip (110) and extends from a corresponding land (150) to the apex (111), where each of the tip faces (190) has a tip face leading edge (173) and a tip face trailing edge (174). Each of tip face leading edges (173) forms an intersection with an adjacent one of the flutes (140) to provide a plurality of primary cutting edges (175). In a tip cross-sectional plane extending perpendicular to the axis (101) through each of the primary cutting edges (175), each of the primary cutting edges (175) lies on a circle extending about the axis (101) and each of the tip face trailing edges (174) lies entirely within the circle. Each of the flutes (140) helically extends in an opposite direction to the drilling direction (102).

Dependencies are inferred from the claim text.