Insert for thread cutting

Details Insert for thread cutting Insert for thread cutting

1990-02-09

1991-10-22

Schmidt, Frederick R.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

407114, 407 70, 82 13, 82110, B26D 100

Patent

active

050590693

ABSTRACT:
A thread cutting insert comprises a block having along one edge thereof a plurality of teeth for successively cutting a thread in a workpiece. The teeth are of successively increasing heights from a first to a last of the teeth. The first tooth has a smoothly convexly curved cutting edge, and the remaining teeth have a multi-sided cutting edge defined by three sides of a trapezoid.

REFERENCES:
patent: 1988770 (1935-01-01), Alexander
patent: 3636602 (1972-01-01), Owen
patent: 4233867 (1980-11-01), Zimmerman
patent: 4409868 (1983-10-01), Huddle
patent: 4531863 (1985-07-01), Smith
patent: 4572042 (1986-02-01), Wiman
patent: 4572713 (1986-02-01), Schmidt
patent: 4645386 (1987-02-01), Smith
patent: 4854785 (1989-08-01), Lowe et al.
patent: 4913604 (1990-04-01), Zaengerle

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