On Thursday 13 July 2017 22:54:18 dave wrote: > On 07/13/2017 05:44 PM, dave wrote: > > On 07/13/2017 06:38 AM, Gene Heskett wrote: > >> On Thursday 13 July 2017 07:27:35 andy pugh wrote: > >>> On 13 July 2017 at 01:01, Gene Heskett <[email protected]> wrote: > >>>> Greetings all; > >>>> > >>>> I have rx'd a 6" scale with a remote readout, made by Shars, or > >>>> at least resold by Shars, with the intention of putting it on my > >>>> Sheldon's tailstock. > >>> > >>> Instead of that, why not CNC-drill with the toolpost? You get > >>> peck-drilling and accurate depth that way. > >> > >> True Andy, but I'd need a truly aligned hole in the table to > >> support the workpiece, which is a stainless steel rod, already > >> bored thru lengthwise and cut rifled, with the ability to locate > >> that bore to microinch accuracy. Oh, and I forgot, the hole in the > >> table would need to be a bit over 30" deep. > >> > >> IOW, this is a lathe job. > >> > >> Cheers, Gene Heskett > > > > Please allow me to attempt to draw a verbal picture related to what > > I thought Andy was saying > > Mount a decent or indecent piece of steel on the crossfeed, large > > enough to allow for a collet. > > I'm thinking 5C or 16C. With a drill mounted in the chuck drill a > > starter hole. Mount a boring head > > in the chuck and bore dia for your choice of collet. Back out and do > > the taper. Make yourself > > a nice brass or bronze nut to affix the collet(s) in the holder. > > This can now hold very long drills > > for drilling for barrel inserts, reamers as appropriate, boring > > heads,boring bars, etc. Your X zero is as good as your measuring > > system and mechanics, ditto with Z. You can shim up if necessary to > > align > > in Y: or grind a bit off the bottom of the block. It is as stable > > and stiff as your cross-slide. > > > > Hope this is useful; I certainly have found it so. > > > > Dave > > > > Ouch! My brain is fried. How weather or age is getting to me. The > > procedure for the taper is > > clearly wrong. Do the taper in the mill with circular interp or mount > the block in the chuck and > do the taper. I used two .5" bolts to hold the block to the > cross-slide. I think that is stiff enuf. > Sorry. > > Dave > I can't blame the weather, so that leaves the age of the wet ram. :( Much more believable excuse since its north of 82 yo now. Might as well put a smiley on it since there's not a lot I can do about that. :) > > -------------------------------------------------------------------- > >---------- > > > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
