A cylindrical device in which the inner or outer ring turns upon a single or double row of hardened balls which roll easily between the two rings, thus minimizing friction. For items with faces specially ground for duplex mounting see bearing,ball,duplex. Excludes:bearing,ball,airframe.
also used for tool set,generator alignment special features, gcu assy fixture 01-497-6626;f/a-18e/f end item identification, agav criticality code justification, (inavy)bearing ball,annular,aircraft part name assigned by controlling agency