Tap

Details Tap Tap

1991-08-29

1993-06-29

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Tool or tool with support

With pitch-stabilizing ridge

408215, 470198, B23G 506

Patent

active

052228479

ABSTRACT:
A tap having a main body having a crest, a heel, and an outer circumference is disclosed. The tap main body has a male screw part at the crest side. At this male screw part, a plurality of grooves opening to the crest and the outer circumference of tap main body is formed. A tap main body has a cutting edge at each ridge part defined by a wall of said plurality of grooves and an outer circumference of a male screw part. These cutting edges each have a crest part and a heel part. The crest part of at least one cutting edge has an axial rake angle which differs from an axial rake angle of the crest part of another cutting edge.

REFERENCES:
patent: 4963059 (1990-10-01), Hiyama
European Search Report, Appln. No. EP 91 40 2338.

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