Checkerboard Sphere Turned Freehand (No Jig) 

This video shows one method for turning spheres without an expensive sphere turning jig. All dimensions are laid out by hand and the cuts are simple and made with standard wood turning chisels. All dimensions are based off of the initial diameter of the cylinder turned, so this method will work for a sphere of almost any size.
#woodturning #woodworking #woodensphere