Drill for generating a hole in a work piece

Details Drill for generating a hole in a work piece Drill for generating a hole in a work piece

1985-04-03

1987-06-02

McFlynn, Joseph H.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

4082035, 408224, 408229, 408703, B23B 5104

Patent

active

046699317

ABSTRACT:
A drill for drilling of work pieces, preferably of composite materials, comprising a cylindrical shank portion (11), a first cutting edge (13) in form of an arc of a circle arranged in the cutting end of the drill and a second cutting edge (16) perpendicularly connected thereto. The edges (13,16) are preceded in the rotational direction by a third cutting edge (14) which during the drilling cuts away the material radially inside a circular groove which is cut by the first and the second cutting edges (13,16).

REFERENCES:
patent: 2978002 (1961-04-01), Ransom
patent: 3546980 (1970-12-01), Lemanski
patent: 3548687 (1970-12-01), Holloway
patent: 4338050 (1982-07-01), Ozer et al.
patent: 4352610 (1982-10-01), Yankovoy et al.

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