How to Design Snap-Fit Ball Joints for 3D Printing - Shapeways Blog
3D Printing Joints
Reprap Kossel M3 Rod End Ball Joint Kit For Diy 3d Printer Rostock Kossel Mini 3d Printer Traxxas 1942 Arms-makes - 3d Printer Parts & Accessories - AliExpress
Generic lockable ball joint by HD_Creator | Download free STL model | Printables.com