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.
55.0 millimeters nominal bore diameter, 55.6 millimeters nominal inner ring width, 25.0 millimeters nominal outer ring width, grease lubrication material, straight bore shape