On Sunday 16 July 2017 21:44:42 Trent Hejazi wrote: > Sorry. That’s how I felt when I first heard of a HAL pin ;) > > Catheads usually have four fine thread set screws and act like a for > jaw independent chuck so you can fine adjust the bores on barrels. By > making one, you can gain some flexibility. By sticking a DTI probe > inside of the bore, you can measure off the bore or grooves in a > barrel and adjust both ends of the barrel to run concentric with the > spindle. They can also be used in facing off a receiver shoulder > after using a mandrel to bring the centerline concentric. > > > https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad= >rja&u > act=8&ved=0ahUKEwi6-4_clY_VAhUCYyYKHT0VAPYQjRwIBw&url=https%3A%2F%2Fww >w.pin > terest.com%2Fpin%2F294845106839231856%2F&psig=AFQjCNFuUssISJFvtHEqrvLf >2d5sZ eC-GQ&ust=1500341478942344 > This one shows.
> Here is an outboard cathead: > > http://img.photobucket.com/albums/v654/300sniper/rifle%20tools/barrelt >hread 2.jpg This one is hiding behind a login, or something. I can well imagine that its nearly the same thing, but riding in a rather large bearing in a steady frame. Perhaps with only 4 bolts. I have a rear of the spindle spider about half built, waiting on some hex brass bar to make the bolts. And I've a couple big alu blocks but before I start carving on those, I have got to come by a power hacksaw I can afford. And find a place to put it. Thats an even bigger problem. I need a garage about 20 feet bigger, in all three directions... But first I'd have to buy some dirt. :( > > > This one is good for pistol barrels and short stuff like bolts: > > http://i628.photobucket.com/albums/uu2/strikerdown/Finished.jpg > > Marshall > > On 7/16/17, 7:57 PM, "Stuart Stevenson" <[email protected]> wrote: > >Agreed - what is a cat head? > > > > > >On Sun, Jul 16, 2017 at 7:11 PM, Gene Heskett <[email protected]> > > > >wrote: > >> On Sunday 16 July 2017 19:13:42 Trent Hejazi wrote: > >> > That¹s another direction I want to try. Basically, a cat head > >> > riding in a ball bearing that mounts in the steady rest. > >> > >> Not familiar with the term "cat head", 'splain plz. Preferably with > >> a link to a pix? > >> > >> > This would allow me > >> > to center a barrel by using the DTI inside a chamber or muzzle, > >> > where I cannot otherwise take a skim cut while supporting on a > >> > center or run it through the headstock. Should save some time > >> > and frustration. > >> > > >> > Marshall > >> > > >> > On 7/16/17, 6:00 PM, "Chris Albertson" > >> > <[email protected]> > >> > >> wrote: > >> > >Why not ball bearings? Then there is no relative movement > >> > > between the rest > >> > >and the part. > >> > > > >> > >As for friction of solid fingers > >> > >lowest friction is a lead/copper alloy, next best phosphor > >> > > bronze. Motor oil helps. > >> > > > >> > >On Sat, Jul 15, 2017 at 7:00 PM, Trent Hejazi > >> > > <[email protected]> > >> > >> wrote: > >> > >> I have brass contact fingers and they work well. When > >> > >> supporting the barrel tennon, they ride on the threads without > >> > >> damaging them. Otherwise, > >> > >> they will always leave an annoying ring on a barrel. Only way > >> > >> to circumvent is to make a collar to slip over barrel, then > >> > >> skim cut concentric with the bore. Other option is to make a > >> > >> set of inboard and outboard cat-heads so you can work near the > >> > >> head stock. This really depends on the spindle bore dia and > >> > >> barrel dimensions you are working with. > >> > >> > >> > >> Marshall > >> > >> > >> > >> On 7/15/17, 8:46 PM, "Gene Heskett" <[email protected]> wrote: > >> > >> >Greetings all; > >> > >> > > >> > >> >My steady rest has steel sliders, which will not do for > >> > >> > working on finished parts. So I need to order a foot of > >> > >> > 1/2x1" brass or copper to make some more better shoes. > >> > >> > > >> > >> >Which will do the least damage to a pre-finished part, such > >> > >> > as the > >> > >> > >> > >>fairly > >> > >> > >> > >> >high polished SS barrel? Brass or copper? > >> > >> > > >> > >> >Thanks everybody. > >> > >> > > >> > >> >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 > >> > >> > >> > >> ------------------------------------------------------------ > >> > >> ------------------ > >> > >> 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 > >> > > > >> > >-- > >> > > > >> > >Chris Albertson > >> > >Redondo Beach, California > >> > >---------------------------------------------------------------- > >> > >----- ----- ---- > >> > >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 > > > >-- > >Addressee is the intended audience. > >If you are not the addressee then my consent is not given for you to > > read this email furthermore it is my wish you would close this > > without saving or > >reading, and cease and desist from saving or opening my private > >correspondence. > >Thank you for honoring my wish. > >--------------------------------------------------------------------- > >----- ---- > >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
