>>>>>>>>>>>>>>>>>>On Monday 11 February 2008, Ian W. Wright wrote:
> >For those who were fascinated by the polygon turning have a look at this > >- http://tinyurl.com/2wqbvl , it achieves the same ends but without any > >extra power or synchronisation of spindle and cutter! The video even > >gives a good indication of how you can make your own!!! > >Usual disclaimer - no connection with company etc. etc. > Gene Heskett wrote: Now that's cute Ian. But the forces would seem to preclude my trying it on my little toy lathe.>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Hi Gene, I'm not sure that the cutting forces would be very great at all. If you look closely at the tools you will see that the front face is dished in creating a cutting edge around the front of the tool. So, coupled with the 1 degree clearance angle of the tool axis and the tool being smaller than the hole its cutting for internal splines etc., the cutting action is that of a knife. It would appear that the whole secret of this is in producing the tools with this sharp cutting edge at the front and then choosing one with an appropriate shape and relative size to the work. I think its a bit like the old 'Spirograph' toy.... -- Best wishes, Ian ____________ Ian W. Wright Sheffield UK "The difference between theory and practice is much smaller in theory than in practice..." ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
