Bearing made of .080 plexiglas that makes a good cheap bearing.
Uses BBs (.177 cal) for balls
Red 'r's are just assembly markings
.100 holes can be used to pin pieces together with coat hanger wire
Print 2 of the SVG in .080 inch (2mm) Plexiglas (acryilc).
Part with larger gap make 2 center pieces.
Part with smaller gap make 2 outer pieces.
Designed piece as a neck bearing for my robot