On Wednesday 26 July 2017 05:09:33 andy pugh wrote: > On 26 July 2017 at 07:10, Gene Heskett <[email protected]> wrote: > > Whats the difference between one ending in A60, and one ending in > > AG60? > > Looking at the table here: > https://www.iscar.com/eCatalog/Family.aspx?fnum=113&mapp=TH&app=78&GFS >TYP=M > > AG60 has a bigger setback from the tip of the outline triangle of the > insert. This gives it a longer leading-edge and means that it can cut > coarser threads, down to 8TPI rather than 16TPI.
Interesting set of tables. I note the recommended turning speeds are, for the diameters of bolts etc I might work with, are far beyond the rpms I can thread accurately. 100-170 meters a minute. I'll have to cut some air and see how fast I can go. Coolant mandatory I'd expect. That means a full circle cover to recover the coolant cause it will be thrown vigorously. I also note that ISCAR, of all people, do not make the smaller 08 sized inserts, their listing starting at 11. And that they do not even make an insert suitable for making a 10 tpi (50 thou wide) thread. So I'll have to grind my own tool. That I've already done, tested on plastic water pipe, but not on this SS barrel steel yet. Due to the threads pitch, needs clearance at the leading edge, making it quite fragile. So my test cuts in plastic are at a 5 thou DOC per cycle look great, but I expect I'll need a 2 or 3 thou DOC to do this SS. GCode already written for that except I'll need a tool change in the middle of it. If I regrind another tool, what would be a suitable angle for the leading edge relief at 10 tpi, and about 1.1" in diameter? Seems like there should be a formula for that. I learned a bit about tool table entries while making a dozen 8mmx1.0 brass bolts in various lengths, and I'll cut more plastic getting this right before I even think about mounting a $465 barrel to do it once. But I'm not sure I am using the z offsets correctly as the backplots in axis aren't registered on-screen when the cuts are. Thanks Andy. 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> ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
