Hole cutter

Details Hole cutter Hole cutter

1996-11-06

1999-11-23

Bishop, Steven C.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

408223, 408703, B23B 5104

Patent

active

059889560

ABSTRACT:
A hole cutter having a body provided with first and second types of cutting teeth. The cutter facilitates the discharge of cutting chips during machining of a workpiece. The tooth depth of the left and right sections of each of the second type of teeth is smaller than that of the left and right sections of each of the first type of teeth. The tooth depth of the middle section of each tooth of the second type is greater than that of the middle section of each tooth of the first type. A linear flattening section is provided at the middle portion of a second blade edge of each tooth of the second type. The flattening section causes each cutting chip to be shaped in a strip-like manner when removed from the workpiece. This separates the ends of the cutting chips from each other and prevents the chips from becoming entangled to one another.

REFERENCES:
patent: 3765789 (1973-10-01), Hougen
patent: 3860354 (1975-01-01), Hougen
patent: 4408935 (1983-10-01), Miyanaga
patent: 4516890 (1985-05-01), Beharry
patent: 4586857 (1986-05-01), Ohmi
patent: 4632610 (1986-12-01), Hougen
patent: 4767245 (1988-08-01), Shoji et al.

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