Drill bit device

Details Drill bit device Drill bit device

1974-07-29

1976-03-23

McGehee, Travis S.

Cutting by use of rotating axially moving tool

Tool or tool with support

With work-engaging structure detachable from cutting edge

145116R, 408214, B23B 5100

Patent

active

039457532

ABSTRACT:
Drill bit construction having a removable lead screw and a drill body with a work face comprised of two planar surfaces which geometrically intersect on a diameter line such that the angle between the two surfaces is approximately 170.degree.. 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.

REFERENCES:
patent: 598142 (1898-02-01), Ferguson
patent: 1140988 (1915-05-01), Kunitz
patent: 1415317 (1922-05-01), Crawford et al.
patent: 3687565 (1972-08-01), Byers et al.

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