Annular hole cutter

Details Annular hole cutter Annular hole cutter

1985-10-15

1986-12-30

Bilinsky, Z. R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408206, 408207, 408703, B23B 4102, B23B 5100

Patent

active

046326103

ABSTRACT:
An annular hole cutter wherein each tooth is formed with a radially outer cutting edge and at least alternate teeth are formed with radially extending, circumferentially staggered inner and outer cutting edges. The bottom face of each tooth is formed with oppositely radially inclined inner and outer back-off faces which intersect in a downwardly extending crest which in turn intersects the radially outer cutting edge. The outer back-off faces of alternate teeth are vertically relieved relative to the outer back-off faces of the intermediate teeth and the inner back-off faces of the intermediate teeth are vertically relieved relative to the inner back-off faces of the alternate teeth a distance greater than the chip load at which the cutter is operated. In the preferred form, the radially inner portion only of the unrelieved inner back-off face is relieved to a greater extent than the relieved inner back-off faces.

REFERENCES:
patent: 3244035 (1966-04-01), Jehle et al.
patent: 3430526 (1969-03-01), Valenziano
patent: 4230429 (1980-10-01), Eckle
patent: 4408935 (1983-10-01), Mizanaga
patent: 4452554 (1984-06-01), Hougen

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