Drill bit

Details Drill bit Drill bit

1983-10-28

1987-06-09

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool having crystalline cutting edge

408211, 408230, B23C 5102

Patent

active

046717102

ABSTRACT:
A drill bit the point of which has two or more outer cutting edges and is formed with a V-shaped notch. The V-shaped notch has its center lying on the axis of rotation of the drill bit and opens in the direction of feed of the tool. The V-shaped notch defines inner cutting edges terminating in respective outer cutting edges.

REFERENCES:
patent: 10744 (1854-04-01), Pease
patent: 2334089 (1943-11-01), Hallden
patent: 2898786 (1959-08-01), Willingham
patent: 3028773 (1962-04-01), Borneman
patent: 4143723 (1979-03-01), Schmotzer
patent: 4373839 (1983-02-01), Negishi et al.
patent: 4440532 (1984-04-01), D'Apuzzo

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