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.
0.5 pounds minimum and 1.5 pounds maximum bearing preload rating, angular load direction, 0.1250 inches nominal bore diameter, c calibration designator, 14.0 degrees minimum and 19.0 degrees maximum contact angle