Drill bit

Details Drill bit Drill bit

1986-05-22

1987-08-18

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408227, B23B 5102

Patent

active

046873880

ABSTRACT:
A drill bit is provided with a pair of cutting edges which are positioned so that a narrow slot is formed therebetween in an area including the rotational axis of the drill bit and so that the lines joining the rotational axis of the drill bit and the innermost points of the respective cutting edges are at an angle not larger than about 160.degree. with each other as viewed in the axial direction of the drill bit.

REFERENCES:
patent: 2847885 (1958-08-01), Wagner
patent: 3966349 (1976-06-01), Osman et al.
patent: 4149821 (1979-04-01), Faber
patent: 4322187 (1982-03-01), Hougen
patent: 4373839 (1983-02-01), Negishi et al.

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