Cutting by use of rotating axially moving tool – Tool or tool with support – With pitch-stabilizing ridge
Patent
1981-07-29
1983-08-02
Culver, Horace M.
Cutting by use of rotating axially moving tool
Tool or tool with support
With pitch-stabilizing ridge
10141R, 408219, 408222, B23G 506
Patent
active
043963218
ABSTRACT:
A tapping tool for making a vibration-resistant prevailing torque fastener combination comprising a conventional first element having a standard thread form with first flank angles and a modified second element having a thread form characterized by second steeper flank angles over the entire length thereof, and a truncated root caused by foreshortening of the flanks over a portion of the thread length to produce a helical flat which firmly engages and typically deforms the crest of the first element when threadedly engaged therewith. A difference in flank angles provides longitudinal clearance to receive the deformed material during the threaded engagement.
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