M12, why bother with tapping? Go for single point and no power issues like with tapping. Cheers Bengt
Den 2016-01-22 kl. 19:12, skrev Sarah Armstrong: > Horsepower is you biggest enemy here , you need as much as you can get . > > On 22 January 2016 at 17:58, Gene Heskett <ghesk...@wdtv.com> wrote: > >> On Friday 22 January 2016 12:43:35 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. The OSG online tool recommends a 27/64” (10.7mm) >>> drill, so I am very close (0.008” difference). Also, if I was using >>> OSG's tap they recommend 23.8764 IPM which equates to a spindle speed >>> of 400 RPM. I can try that (I used 300 RPM), but I suspect I am going >>> to have the same (torque) issue I had before. And perhaps the answer >>> is I just don’t have enough torque at low spindle speeds to do it in >>> one pass… >>> >>> -Tom >> Spinning a 12mm tap in my G0704, in low backgear, will likely require a >> not more than 1/4 turn deeper per peck cycle. Its only a 1 horse. >> >> A 10mm tap made it do some serious belly dragging, but did get it done at >> a turn per peck. It also did a 3/8 USS tap into a slightly undersized >> hole in a white ash jig base, but I used all the tap, at about a turn >> per peck. Made great threads in the wood, and for a change, the studs >> stood dead straight up! >> >>>> On Jan 22, 2016, at 12:00 PM, John Thornton <j...@gnipsel.com> wrote: >>>> >>>> What kind of tap did you use? I use only ElectroLube coated taps >>>> from OSG. OSG has an online tool to select the correct tap and drill >>>> for each job. I once had to deep hole tap in some 7075 and my normal >>>> taps broke off. I used the tool and got the right tap and drill so >>>> the hole size was correct for the job. Tapping charts usually use >>>> 75% thread depth which is usually OK for a depth = diameter, for >>>> deeper depths you need a bigger hole. >>>> >>>> JT >>> ---------------------------------------------------------------------- >>> -------- 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 >> >> Cheers, Gene Heskett >> -- >> "There are four boxes to be used in defense of liberty: >> soap, ballot, jury, and ammo. Please use in that order." >> -Ed Howdershelt (Author) >> Genes Web page <http://geneslinuxbox.net:6309/gene> >> >> >> ------------------------------------------------------------------------------ >> 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 >> > > ------------------------------------------------------------------------------ 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
