Thank you very much for the clarification. However, I had two questions following your explanation (sorry if they may seem silly):
1) How can I determine the relationship between the taper angle and the misalignment tolerance necessary to allow the pin to enter the hole? In other words, is it possible to perform a parametric study (maybe in Ansys itself) to understand how much I can push with the reduction of the taper angle in order to reduce the axial thrust?
2) If I understand correctly you are suggesting me to check that the deformation in the circumferential direction Y (measured on the surface of the coupling between shaft and flange) does not exceed the positioning accuracy tolerance required for my application. Correct?