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.
0.5000 inches maximum outer ring outside diameter, 0.3125 inches maximum bore diameter, ground photographic equipment, new hampshire ball bearings inc end item identification, 0.0310 inches nominal flange width, 0.5470 inches nominal flange outside diameter