Two single row annular ball bearings selected dimensionally to be a matched pair or set. The ring faces have been specially ground to specified offsets that will produce predetermined preload when mounted. May include a single row angular contact bearing with faces specially ground for duplex mounting.
5.0 degrees minimum and 25.0 degrees maximum contact angle, 0.0006 inches minimum radial and 0.0008 inches maximum radial internal clearance, 1.75 pounds minimum and 2.25 pounds maximum bearing preload rating, 0.234251 inches minimum and 0.234300 inches maximum bore diameter, angular load direction