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.
straight bore shape, 0.0009 inches minimum radial and 0.0017 inches maximum radial internal clearance, contact bearing seal type, 55.0 millimeters nominal bore diameter, extra loose internal fit-up designation