On Saturday 23 January 2016 01:07:28 Jon Elson wrote: > Hmmm, one other way to do this, if you don't have a lot of > holes to do, is a single-row thread mill. > traditional thread mills are good for only one thread > pitch. Single row thread mills only have one row of cutting > edges, so you run a pass much like a single point threading > operation, but with the cutter spinning in the spindle. It > does an amazing job of cutting oddball threads, and they > look just like they were tapped. > This, of course, is good for a mill, not usable on a lathe, > as you need to orbit the X and Y axes as the Z withdraws up > the hole. (You thread from bottom to top so the hole is > climb milled for best surface finish.) > > I have a generic c program to write the G-code, if anybody > needs it. > > Jon
I have such a single row mill, nominally .750" OD, 1/2" shank, but have not ever used it for lack of knowledge how to properly drive it, and lack of real need to use it so far. I would appreciate a PM'd copy of that, "just in case". I have been considering making me a pair of dual screw, 1.250" wooden screws, woodworkers vises, but the length of screw needed would exceed what I can do on my toy lathe, so the screw part has been put off until I can acquire a suitably longer lathe. Such code would greatly simplify making the nuts on the mill. I had made a couple of paddleboard vices, using 3/4" ready thread, but the front vise seized its screw in the nut & broke the nut holder 2 or 3 years back, rendering a good solid woodworkers bench into a storage catchall. But its top is 2x4 stock on edge, 6 foot long, planed flat, oil finished so dried, spilled glue can be peeled off, and it weighs in the 350 lb area. A good sturdy bench, if it had working vises. A new bench, ready-made with simpler vises is in the $1600-$2000 range, so I hate to clear a path and tow it out with my WV Cadillac just to be made into firewood. Thanks Jon. > ---------------------------------------------------------------------- >-------- 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 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
