Boring tool

Details Boring tool Boring tool

1977-08-22

1978-08-22

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

408206, 408226, B23B 5100, B23B 4102

Patent

active

041085671

ABSTRACT:
The drill of the invention comprises a drill head having at least one guide pad, at least one outer cutting insert located at the periphery of the drill head surface and at least one inner cutting insert, having an active cutting edge, located nearer to the center of the drill head surface. The active cutting edge of the inner insert is situated within the outer edge of the guide pad or pads. Preferably, a plurality of cutting inserts are so arranged on the drill head that the resulting cutting force at all engaged inserts is on a level with the outer end of the guide pads.

REFERENCES:
patent: 2869405 (1959-01-01), Wolfe
patent: 3244035 (1966-04-01), Jehle et al.
patent: 3376763 (1968-04-01), Welles
patent: 3548687 (1970-12-01), Holloway
patent: 3751177 (1973-08-01), Faber
patent: 3816018 (1974-06-01), Hlocky

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