Drill for generating of holes in a work piece

Details Drill for generating of holes in a work piece Drill for generating of holes in a work piece

1986-03-04

1987-12-15

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having inversely angled cutting edge

175421, 408227, B23B 5100

Patent

active

047129522

ABSTRACT:
The invention relates to a drill for generating of holes in a work piece, preferably in a composite material. The drill comprises a cylindrical shank portion, two cutting portions projecting in the axial and radial direction of the drill and two chip gullets. The cutting portions are arranged symmetrically about the center axis of the drill and each comprising a cutting tip, a minor cutting edge and a free-cutting edge. The cutting portions are shaped such that they require a small feed force in order to drill in the work piece.

REFERENCES:
patent: 796321 (1905-08-01), Granberg
patent: 1352825 (1920-09-01), Meredith et al.
patent: 1977085 (1934-10-01), Pripps
patent: 2357835 (1944-09-01), Leissler
patent: 2372612 (1945-03-01), Stogsdill
patent: 4352610 (1982-10-01), Yankovoy et al.

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