yes i agree , single point would be a far better option , when you dont have the horsepower ,
On 22 January 2016 at 18:17, Bengt Sjölund <beng...@tecno.se> wrote: > 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. 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