On Friday 22 January 2016 14:07:00 Gene Heskett wrote: > On Friday 22 January 2016 13:39:21 Sarah Armstrong wrote: > > yes i agree , single point would be a far better option , when you > > dont have the horsepower , > > So at some point, I need a boring head with an R8 rear end on it. > Something I haven't yet acquired. > > Thanks Sarah. > > Cheers, Gene Heskett
But, in looking over the offerings, I note at least 3 gotcha's. 1. No, or very few, indexable tools short and fat enough of a shank as to be usefull using a G33.1 rigid tapping drive. What I have, at 3.5+ inches long, has too small a shank to fit the smallest heads, and it certainly won't do anything but chatter & wreck the chip if its sticking out 2.75". 2. They all screw onto the R8 shank, which leaves the possibility of it unscrewing itself from the R8 if the reversal is too violent, which on my machine is a definite possibility. 3. Since it would not have a tip withdrawal for backout clearance like G76 does, the tip is going to be drug backwards coming back out of the hole with that friction adding to the developed heat. The question is, will that be enough heat to stop the chatter/shatter? IDK. I read more minuses than plusses. Handy for boring an arbitrarily large hole perhaps, but is that not why we have G2/G3 for? The only advantage might be a faster bore, but all the stopping and fooling with the offset dial would eat up that faster time. Probably a more cylindrical bore since the tool shank flex is the same at the bottom of the hole as it is at the entrance, But so far, knock on wood, that has not been a problem in what I've done. So until I can convince myself its a better way, I think I'll just write the gcode to do it. Thanks all; 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
