Multiple-tooth drill bit

Details Multiple-tooth drill bit Multiple-tooth drill bit

1984-12-10

1987-02-24

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

408227, 408214, B23B 5102

Patent

active

046453890

ABSTRACT:
A multiple-toothed drill bit having at least three teeth is provided with front end cutting edges having respective outer and inner cutting edge sections oriented angularly to each other and meeting at respective frontwardmost cutting points located in a common plane, and with an axial centering spur having laterally outwardly and rearwardly inclined center cutting edges merging with the inner front end cutting edge sections via respective frontwardly concave cutting edge sections.

REFERENCES:
patent: 10744 (1854-04-01), Pease
patent: 2334089 (1943-11-01), Hallden
patent: 2391396 (1945-12-01), Denison
patent: 4143723 (1979-03-01), Schmotzer
patent: 4285620 (1981-08-01), Luebbert et al.
patent: 4330229 (1982-05-01), Croydon
patent: 4529341 (1985-07-01), Greene
Technische Rundschau, Von K. Hauser 1976.
Article "Der Spiralbohrer Und Seine Wirtschaftliche Anwendung" (Guhring Vertriebsgesellschaft).

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