Drill insert

Details Drill insert Drill insert

1996-11-20

1999-10-26

Pitts, Andrea L.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408223, 407 34, 407 42, 407113, B23B 5100

Patent

active

059716762

ABSTRACT:
A drill insert has a polygon plate-shaped body that defines a top face and a central shaft extending substantially perpendicular to the top face. A pair of first cutting edges are formed on the top face in a dot symmetrical relation with respect to the central shaft. A pair of second cutting edges are formed on the top face in a dot symmetrical relation with respect to the central shaft. The second cutting edges are disposed adjacent to the first cutting edges. A projected cutting edge portion is provided in each of the second cutting edges. The projected cutting edge portion outwardly projects from each of the second cutting edges in a radial direction with respect to the central shaft.

REFERENCES:
patent: 5232319 (1993-08-01), Satran et al.
patent: 5382118 (1995-01-01), Satran et al.
patent: 5437522 (1995-08-01), Satran et al.
patent: 5688083 (1997-11-01), Boianjiu

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