Forstner bit

Details Forstner bit Forstner bit

1995-07-21

1997-12-09

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408233, 408239R, 408226, B23B 5100

Patent

active

056953046

ABSTRACT:
A Forstner bit including a cutter having radial major cutting edges, circumferential cutting edges and a shank adapted to be clamped in a chuck. The cutter is threadably attached to the shank by a rear stem of the cutter being accommodated in a threaded hole provided in the shank. The cutter is formed as a monolithic casting fashioned of a precision-casting steel alloy, with the cutter being subjected to additional grinding only along the major cutting edges and the circumferential cutting edges.

REFERENCES:
patent: 0041517 (1864-02-01), Low et al.
patent: 0804602 (1905-11-01), Howk
patent: 3521507 (1970-07-01), Yogus et al.
patent: 3658435 (1972-04-01), Kubicek
patent: 3945753 (1976-03-01), Byers et al.
patent: 4090807 (1978-05-01), Stewart
patent: 4405269 (1983-09-01), Hertzler
patent: 4449865 (1984-05-01), Yankovoy et al.
patent: 4753558 (1988-06-01), Jansson
patent: 5092719 (1992-03-01), Zsiger
patent: 5399051 (1995-03-01), Aken et al.

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