On 22.01.16 12:43, tom-...@bgp.nu wrote: > This is the tap I am using: > http://www.mscdirect.com/product/details/58607482?rItem=58607482 > The drill I am using is 10.5mm which is 0.875 of 12mm so I would say > that seems fairly large.
For M12, a 10.5 mm hole gives 69% thread engagement. Taking as rule of thumb for avoiding busted taps: < 6 mm: ~ 60% thread engagement ; 6 - 10 mm: 70% ; > 10 mm: 75% you could drop the hole size marginally if the hole isn't deep, and the spindle will power it, I think. > The OSG online tool recommends a 27/64” (10.7mm) drill, so I am very > close (0.008” difference). That only gives 60% thread engagement, if counting on my fingers is working for me. Erik ------------------------------------------------------------------------------ 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
