See All 6 Photos High quality rod ends ... the resulting noise created by the sloppy joint can be annoying, and may eventually lead to body failure. Spherical uniball assemblies may be used ...

One such example is [jicerr]’s joystick, which uses a pair of spherical flexure joints recently developed by researchers from Delft University of Technology in the Netherlands, See the videos ...

Based on a penguin's shoulder-and-wing system, the mechanism features a spherical joint that enables three degrees of freedom and a fixed center of rotation. "Unlike an animal shoulder joint ...