On Sun, 21 Mar 2021 at 01:12, Gene Heskett <ghesk...@shentel.net> wrote:
> It seems to me there ought to be a std math rule for that, but I've not > found a reliable reference. Why do you think that? Surely the manufacturer can make any flat that they want? I would measure the actual shaft (flat to rounded opposite curve) then dimension my sketch to that actual number (my printer shrinks holes, so I wouldn't make it any tighter deliberately) -- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users