I'm having a real nightmare with this one.
I'm trying to mate the roller's hexagon shaft with the hexagon hole. hole is 11.5 mm shaft is 11 mm.
I've tried using advanced mate, width. This works for the first shaft, however it throws out the alignment at the other end.
Any help much appreciated.
In addition I would suggest you to create an axis in the roller rather than using the temp axis. And make sure you use the default planes to create the axis rather than using the roller geometry.