On 21.05.18 22:19, Gene Heskett wrote: > Greetings all; > > The first "tap hat" is done, and has a 5mmx.8 tap mounted in it.
When the box of 10 different grubscrews arrived, it seemed like a good idea to write the size and _pitch_ over each compartment, on the transparent lid. That saves time later. > But I've got to profile how far off center that 3" chuck mounted to my > rotary table wobbles, so I can write a short thing to drill the 4 holes > in the side that hold the grub screws, I must have been an hour and a > half piddling with that and actually get the grub screws centered on the > tap butt flats. For the original tap hats, all I used to center on the cylindrical top was the old 6" steel rule seesaw, with a pointy tip in the drill chuck. When the seesaw's level, it's centered. (Certainly well enough to hold the bum end of a tap already aligned in a close-fitting bore, I figure.) > Only about 50 more to go. :( ISTR that you've made them all out of a bar of ¾" brass, so the one centering ought to do for the lot? With an A axis to spin the 90°, you can drill 4, then tap 4, for ¼ of the tool changes. Erik ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
