Indexable insert drill

Details Indexable insert drill Indexable insert drill

1977-04-21

1978-11-07

Hinson, Harrison L.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

408199, 408705, 408713, B23B 5100

Patent

active

041243285

ABSTRACT:
An indexable insert drill employing a pair of radially opposed inserts having either positive or negative axial lead cutting edges extending in the same cone of revolution. One of the inserts has a radially inner arcuate corner intersecting and extending across the axial center line. The other insert is located relatively overlapping but outward radially with an outermost corner adapted to finish cut the side wall diameter of the hole. Insert cutting edges provide for chip interruption and breakage.

REFERENCES:
patent: 3540323 (1970-11-01), Rishel
patent: 3791001 (1974-02-01), Bennett
patent: 3816018 (1974-06-01), Hlocky
patent: 3963365 (1976-06-01), Shallenberger, Jr.
patent: 4047826 (1977-09-01), Bennett

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