john this is the standby reference that i start with it is a really good reference and the ONE that i trust most , well worth the 20 bucks. http://www.ebay.com/itm/Machinists-Speed-Feed-Calculator-CNC-Mill-Tooling-/230704129486?pt=LH_DefaultDomain_0&hash=item35b709a5ce
jeremy youngs On Mon, Jul 21, 2014 at 12:13 PM, John Thornton <bjt...@gmail.com> wrote: > I'm writing a little Python program to give me RPM and IPM for twist > drills. I have found some conflicting and some very old charts for feed > per revolution like this one: > > > http://www.free-ed.net/sweethaven/IndustrialTech/machinist01/pics/ch04.h1.gif > > I use mostly screw machine drills with 135° split point in my mill and > lathe. Does anyone have a better chart or a formula for feed per rev? > > The little program is here: > > http://gnipsel.com/files/sfc/ > > I still need to add an RPM limit and a zillion other things... > > JT > > > ------------------------------------------------------------------------------ > Want fast and easy access to all the code in your enterprise? Index and > search up to 200,000 lines of code with a free copy of Black Duck > Code Sight - the same software that powers the world's largest code > search on Ohloh, the Black Duck Open Hub! Try it now. > http://p.sf.net/sfu/bds > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Want fast and easy access to all the code in your enterprise? Index and search up to 200,000 lines of code with a free copy of Black Duck Code Sight - the same software that powers the world's largest code search on Ohloh, the Black Duck Open Hub! Try it now. http://p.sf.net/sfu/bds _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
