... > With 60 teeth you have about 6 degrees of positional uncertainty. With > a 24 tpi / 1mm pitch tap that's about 0.0007" or 0.02mm axial error. > The tendency will be for the tap to rub on the lower thread flank as > it backs out. > > If you use a floating tap holder then this won't be a concern. > > I think you are just about OK at 60, but going any less I think that a > floating holder would give better threads.
Rigid tapping is a good method to test machine accuracy but floating holder give a better result? Tap wear? Nicklas Karlsson _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
