Cylindrical head boring tool

Details Cylindrical head boring tool Cylindrical head boring tool

1998-01-21

1999-11-02

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

408213, B23B 5102

Patent

active

059758147

ABSTRACT:
A cylindrical head boring tool (1), such as a Forstner drilling tool, with a main cutting edge (4) having a centering point (5). The main cutting edge extends diametrically across the entire circular cross-section of the boring head (3), the main cutting edge (4) having cut out surfaces (11), and chip channels (7) adjacent the main cutting edge (4). The chip channels (7) open through the outer periphery and extending obliquely through the boring head (3). Each end of the main cutting edge (4) is adjacent a preliminary cutting edge (8) coinciding with the circumference of the boring head (3) for guiding the boring tool (1). The preliminary cutting edge (8) reaches to the edge of the respective other chip channel (7) and forms the peripheral edge of an essentially cylindrically curved wall (6) of the boring head (3). The otherwise smooth wall (6) is interrupted by radial throats (13).

REFERENCES:
patent: 2613710 (1952-10-01), Emmons
patent: 4090807 (1978-05-01), Stewart
patent: 4753558 (1988-06-01), Jansson
patent: 5193951 (1993-03-01), Schimke
patent: 5312207 (1994-05-01), Pomp

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