Hi everyone. I am having a hard time trying to make an assembly motion simulation with some geometry imported from rhino. What I need to do is pretty basic: A cylindrical pole with a ring that slides thorugh it.

I think that the correct way to do this is creating a parallel mating between the pieces, and then a concentric mating to fix their position. However, I'm being unable to set any of them because the geometry is imported in such a way that, for instance, the cylinder cap contour is being exploded into four arcs, that are not actually "arc edges" but just "edges" (and therefore, they are not useful for making the concentric mating for instance... and maybe this is not the exact terminology, but I'm really new into Solidworks and english is not my native language ).

Anyway, my question is: Is there anyway to fix this problems, whether in rhino or solidworks? I think that it has to do with the way I modeled the geometry in rhino (I basically used the Extrude Surface command, rather than extruding curves and then caping them). The thing is that I spend the whole day modelling, so I would not like to have to make the whole model again.

I'm using Solidworks 2012 SP4

Rhino 4.0

Importing 3dm files into Solidworks (also tried IGES).

Thanks!