I would have to look again.. but I think I remember the k&t ball screws are preloaded to 1 ton of force..
Sam On Sun, Jan 4, 2026, 10:03 AM Ray Henry <[email protected]> wrote: > > Many of these commercial machines have double ball nuts and a linkage > between so that they can be rotated against each other to take up wear. > > > On Sun, 4 Jan 2026 at 12:59, Stuart Stevenson <[email protected]> wrote: > >> > >> I don't know how much preload is considered 'tiny'. The 5 axis Cinci X > >> travel is 120". The preload stretch is supposed to be .007" measured > >> with > >> an indicator on a mag base on the casting beside the screw while > >> tightening > >> the nuts. > > > > That sounds very tiny on that length. It pretty much falls off the > > bottom of this bolt-stretch calculator. > > https://www.engineersedge.com/hardware/bolt_elongation_formula_15777.htm > > > > -- > > atp > > "A motorcycle is a bicycle with a pandemonium attachment and is > > designed for the especial use of mechanical geniuses, daredevils and > > lunatics." > > — George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
