Erik, better let's be it as it is with metric thread values. If you are selling things over here containing non-DIN/ISO threads (and other things), you will be liable for all damage that could occur with them in ordinary use and you will have to prove that your threads are just as good as DIN/ISO, which isn't easy and not cheap either. You participate in a call for tenders, the first thing you have to sign is that you will keep all existing DIN/ISO norms and standards.
These standards are like laws in industry, handcrafts and trade. No discussions, no use to calculate anything, just use the tables, DIN/ISO 13 in this case. Anybody involved in mechanics can rush down the numbers when you wake him up in the middle of the night. I have run a machine shop with up to twenty workers for 36 years and I never heard about percentage of engagement etc. When you order a box of drills for thread cutting, you will get exactly the bits needed for the M-threads, that's all. They are often sold separately this way to save the lives of the ordinary drill bits in the all-purpose cassettes, increasing by 1/10 mm from 1 mm to 10. Peter Am 25.01.2016 09:36, schrieb Erik Christiansen: > On 24.01.16 14:16, [email protected] wrote: >> OSG, referenced earlier by John Thornton, has this tool >> (http://www.osgtool.com/Technical.asp?tid=1&id=1) that calculates hole >> size given Major Dia, Pitch, and Engagement (% of Thread). Their >> numbers seem to be slightly different than Erik’s though, but they >> suggest 60-70% engagement for deep hole tapping. > --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. http://www.avast.com ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
