Hi Gene Why don't you; - take a 6mm or 1/4in or similar bright rod. Maybe 20mm long; - mount in the lathe and use the 1mm drill to make a hole - go to the milling mahine - place a 6mm centre drill bit in a 6mm collet - start a drill hole in some scrap - remove the 6mm drill and insert the drilled rod - place loctite on the rear of the drill shank and place in the rod hole - drop the Z until the 1mm drill bit centres in the 6mm start hole that you made, which should set it quite straight - do similar with other small drill bits
Regards Roland On Wed, 26 Feb 2020 at 20:36, Gene Heskett <[email protected]> wrote: > Greetings all; > > I seem to have lost the ability to hold a drill bit in the 40 thou size > range with the loss of the micro hf mill I have 1.5 mm and 1mm collets > for the teeny ER on the 6040's spindle but that won't take a 43 thou in > the 1mm, and the 1.5mm will but runs it crooked by 3x the diameter of > the drill with 10mm of stickout. I suspect I have a crappy set of > collets. The 1.5mm is an 8 petal design, but the 1mm is a 4 petal and > too stiff to allow it to take a 43 thou drill. > > I'm trying to do pilot holes to thread for 0-80 screws so I can push one > of these ATS-667's around for good quadrature. This ER is a stretch it > a bit to get a 1/4 probe shank in it. > > So I guess the question is: Where can I get a decent 1mm collet, or maybe > a teeny drill chuck that might hold a drill that small true? And has a > shank that fits a 7-6 marked collet? > > This 1mm collet at only 4 petals might as well be solid steel. The 1.5mm > is squeezed so hard by the time it grips the drill that the ejector > grove is too small for the nut, or too high on the face and I have to > remove the nut, then use pliers on the collet to remove it. Sloppy build > is as kind as I can be in describing it. > > I see Shars has one on page 138, but its 2.5" long with a 1/4 inch shank > and at $9.95, useing dremel pattern collets, "runs true" is not in its > vocabulary. > > Thanks for ideas guys. > > 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) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
