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.
actuator assembly used on air shutoff butterfly valves,part numbers 35-277 and 35-277a. t.o. 15a2-2-51-4,figure 3. special features, straight bore shape, steel overall material, bearing,ball,annular part name assigned by controlling agency, actuator assembly end item identification