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
