On 23 January 2016 at 16:53, Gene Heskett <ghesk...@wdtv.com> wrote: > Does that not give a 100% thread? I was under the impression we use a .85 > multiplier.
The idealised depth of thread for a perfectly sharp 60 degree thread with no rounding or flats is: (pitch/2) * tan(60) = 0.866p The core size of the thread is this D - 2 * 0.866p = D - 1.72p However: There is an H/4 flat on the internal thread, so the real thread core is D - 1.22p If you drill a hole of D-1p then you are at about 78% engagement. https://en.wikipedia.org/wiki/ISO_metric_screw_thread -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ 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=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
