From the SpaceClaim help file it’s noted that you can start spinning a design around a highlighted line, edge or axis:
Additionally, you can highlight an edge (or other object) with the ALT key and use that as a spin center:
Well, guess what. The world origin consists of three axes … so any of the individual x, y, and z (shown below) axes may be used as a spin center.
Hope this helps save someone some time.