Thanks for the replies and good suggestions. For clarification, this part is being cut on a lathe with a radius point UNJ insert. This type of insert if allowed to cut a revolution without feed should leave a circumferential groove with a radius bottom (current parts). Unless I find some type of...
Design - shaft partialy threaded with external thread 1/2-20 UNJ.
I want to minimize fatigue failure by having the thread taper off at the point where the thread terminates on the interior portion of the shaft, versus having the single point cut a full rotation at the end of the thread.
Is...
