Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Patent
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
Hinson Harrison L.
Sandvik Aktiebolag
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