Drill bit device

Details Drill bit device Drill bit device

1974-08-26

1976-07-13

Abercrombie, Willie G.

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, B23B 5102

Patent

active

RE0289000

ABSTRACT:
Drill bit construction having a removable lead screw and a body which has a conically shaped work facing surface. With generally triangularly shaped cut-away segments. Each of the segments has a cutting edge either in the form of a detachable blade or integrally formed into the body. The body itself is also detachably removable from the drill shaft or shank. In smaller diameter embodiments a spiral member recedes from the shaft adjacent the head for removing shaving as the bit proceeds through the wood.

REFERENCES:
patent: 598142 (1898-02-01), Ferguson
patent: 3180379 (1965-04-01), Stewart

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