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.
b-1b acft end item identification, straight bore shape, 2.1650 inches minimum and 2.1654 inches maximum bore diameter, angular load direction, 3.5429 inches minimum and 3.5433 inches maximum overall outside diameter