On Tue, 16 Apr 2013 07:21:18 -0400, you wrote: >But the QC itself gets loosened and turned because a .125" 2 flute endmill >is the best tool for boring small holes. I set it straight, and use a low >angle drill bit to rough out the primer pocket for a 209, then mount an >1/8" 2 flute coated carbide endmill in the drill chuck, which is itself >mounted to a 3/8" boring bar holder, and turn it so one of its 2 sharp >corners is dead level in front, then loosen the whole post and turn it >about 5 degrees to me. Makes a great boring bar for a .240" diameter >pocket about .250" deep.
Gene - .240 is remarkably close to 6mm (.2362 in) - a 6mm endmill, or flat bottom drill would do that no problem without any of that messing about, and as they generally cut oversize I'd bet it would be even closer to .240 :) Steve Blackmore -- ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
