Snap-together Sphere
thingiverse
A three-ring sphere, created as a demonstration project, showcases interlocking components with dimensions of 60mm outer diameter, 20mm height, and 3mm thickness. The STL files feature one face every 2mm of the perimeter, along with a 0.4mm gap in the slots for a snug fit. Additional examples (40mm diameter, 5mm and 10mm height, and potentially 2mm thickness) are included but may require cleaning to ensure proper fitting. Photos available at http://www.flickr.com/photos/aubenc/sets/72157627518857918/. An updated OpenSCAD file addresses a tolerance issue between rings, thanks to feedback from foofoodog. To assemble the sphere, simply print and snap the rings together.
With this file you will be able to print Snap-together Sphere with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Snap-together Sphere.