Shaft taper fit - tolerance spec or area of contact

[TrevorH]

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.

 

[fcsuper]

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
Lorono's SolidWorks Resources
Co-moderator of Solidworks Yahoo! Group
and Mechnical.Engineering Yahoo! Group