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.
mil-g-23827 mil spec single material response lubrication material document and classification, straight bore shape, 0.1875 inches nominal bore diameter, radial load direction, 0.0002 inches minimum radial and 0.0004 inches minimum radial internal clearance