Drill bit device

Details Drill bit device Drill bit device

B - Operations, Transporting

23

B

77/30

B23B 51/00 (2006.01) B27G 15/00 (2006.01)

Patent

CA 1041801

DRILL BIT DEVICE Abstract of Disclosure Drill bit construction having a removable lead screw and a drill body with a work face comprised of two planar sur- faces which geometrically intersect on a diameter line such that the angle between the two surfaces is approximately 170°. A cut-away segment is formed on each side of the body with each of the segments having a-cutting edge in the form of a detachable blade which is also provided with a cutting spur on the outer end. The body itself is detachably removable from the drill shaft or shank. The body is also provided with a removable lead screw or guide point.

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