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.
20.4985 inches minimum and 20.5000 inches maximum overall outside diameter, straight bore shape, 0.0010 inches nominal radial internal clearance, radial load direction, 17.4985 inches minimum and 17.5000 inches maximum bore diameter