This is a computer-style fan designed as a concept to show the kind of geometries you can produce with a typical 3D printer. To make this fan you need to download two STL files and acquire two common ball bearings (4x18x12mm). The 3D-printed parts consist contain some challenging geometries such as steep ang extreme angles, as well as perfectly flat surfaces which are not printable without the use of support structures.   If you are note familiar with 3D-printing using support structures, settings optimisation, etc, then this is the perfect model for you to step up to the next level!/By http://Creative-Tools.com