Ball bearing into ball&socket stopmotion joint - YouTube
Ball joint bearings for 3 axis rotational movement
PHS6 6mm Bore Diameter Rod End Bearing M6x1.0 Thread Ball Joint Rod End - AliExpress
Rod End Ball Bearings, Fisheye Female Thread Connector Joint Bearing Fisheye Joint Rod End Bearing Self Lubricating for Electric Tools for Automation Equipment: Amazon.com: Industrial & Scientific
Coleman COLMIB-12 - Replacement Bearing for COL834-400 Ball Joint | Capital Motorsports Warehouse