On Sun, Feb 7, 2016, at 04:18 PM, andy pugh wrote: > Maybe I should have been more explicit about the question... > > How do you machine an internal part-thread that ends hard against a shoulder? >
Very carefully :-) This pic http://www.eugeneleeslover.com/PAGE_56_Figure_5B10_C.JPG shows that there was a bit of a relief groove. Cutting speeds in those days were slower (no carbide). They may have simply run the parts slow enough that a rapid-retract toolholder could pull clear in the time it took to travel the width of that groove. John Kasunich jmkasun...@fastmail.fm ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
