Fillet to a Sphere: The most obvious way to create a sphere is sketch a half circle and use the revolve feature to create the sphere. However, it turns out that it’s possible to turn a cube into a sphere using the fillet tool!
Download: Fillet to a Sphere
Features: Global Variables, Midplane Extrude, Fillet, Delete Face
DraftSight Download: In conjunction with DraftSight, Dassault Systèmes’ 2D CAD product, the 2D drawing(.dwg) file of the Fillet to a Sphere is now available for download here.