Hole cutter

Details Hole cutter Hole cutter

2006-09-27

2009-12-15

Howell, Daniel W (Department: 3726)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

C408S703000

Reexamination Certificate

active

07632049

ABSTRACT:
The front cutting edge is provided with an inner front cutting edge connected with an inner lateral cutting edge and an outer front cutting edge connected with an outer lateral cutting edge. A front flank corresponding to the front cutting edge is provided with an inner front flank corresponding to the inner front cutting edge and an outer front flank corresponding to the outer front cutting edge. An inner front clearance angle of the inner front flank is set at a larger value than an outer front clearance angle of the outer front flank. Therefore, it is difficult for the hole cutter to be chipped, and its cutting performance is also good.

REFERENCES:
patent: 2610529 (1952-09-01), Atkinson
patent: 3387511 (1968-06-01), Ackart, Sr. et al.
patent: 3609056 (1971-09-01), Hougen
patent: 4586857 (1986-05-01), Ohmi
patent: 4596499 (1986-06-01), Fangmann et al.
patent: 5145296 (1992-09-01), Hougen
patent: 2100151 (1982-12-01), None
patent: 05329706 (1993-12-01), None
patent: 08252708 (1996-10-01), None
patent: 2005040918 (2005-02-01), None

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