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jeph00
in reply to: daniel_lyall

Hi Daniel.

That is correct. Actually the way I plan to do this is to hog out most of the material with a 1/4" end mill and then clean it up with a custom form tool to get that proper profile.

But this still does not explain why I am getting a stepover within the "worm" instead of a consistent worm progressing along the shaft. See attached. That's 2 opposite sides of the test piece.