Yes, the gap is constant, all of the surfaces are exactly concentric.
I tried mating the surfaces and mating the axes and I tried to insert them but could not get rid of the gap.
In reality the situation would be like putting a cone shaped part for example a drill with a morse taper on the end for a drill press. In reality the tapered surfaces of the assembly are in full contact.
But when I try to use mate or insert in Inventor, the surfaces don't contact each other...
How can I assemble two parts, one is a tapered pin, the other is a tapered hole both with the same wall angle.
I tried mate and insert but neither of these make the surfaces contact each other