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.
25.0 degrees minimum contact angle, 0.4998 inches minimum and 0.5000 inches maximum bore diameter, 0.0005 inches minimum radial and 0.0008 inches maximum radial internal clearance, angular load direction, straight bore shape