How to mate two sperical surface ?

Hello everyone,
I am trying to assemble two spherical surfaces. One is the complete sphere and the other is a hollow spherical component. I can put concentric of the two circles in two components, but there is no other mate than I can achieve. Can anyone help, please?

1 Answer

In each spherical part, draw some line using any plane or just make a 3D sketch. When the parts are assembled, these lines can be used to mate the parts.
In fact, any constructional line of a part can be used for mating parts in the assembly. In this case, the constructional lines of each part need to make visible in assembly.