Thingiverse
The Popcorn Joint - Simple Ball & Socket Joint for PLA by Wonderbot
by Thingiverse
Last crawled date: 4 years, 3 months ago
Several other ball & socket joint models on Thingiverse are not designed for PLA but this version is. Ball snaps tightly into itself. The friction fit allows each joint to hold it's position. Joints are also hollow to allow a cable through.