shaft taper fit - tolerance spec or area of contac
 

shaft taper fit - tolerance spec or area of contact
looking through various en and iso standards has not helped. if the shaft or hub is blued and fitted together [rotated] a percentage area of the other component is marked.
i am looking for guidance on what would be an acceptable marked area? some publications for machine tool spindles state 80%! is there any basis for this or other values?
the actual taper is for a replacement hub with a 1/10 taper at 190 dia, at the small end, x 280 long and is used to support and fix a "disk" of 4000 kg.
this may be not gettin getting attention because more detail is needed. do you have the specific standards you are referring to? do you have a sample drawing of the situation?
matt lorono
cad engineer/ecn analyst
silicon valley, ca