Reactor coolant pump motor rotator

An apparatus for imparting rotation to a member supported for rotation within a surrounding housing is described which includes: (a.) a first semicylindrical segment embodying a first split ring ball bearing including a first inner diameter race and a first outer diameter race, the first inner diameter race and the first outer diameter race being cooperatively associated one with another so as to enable relative motion to occur therebetween; (b.) a second semicylindrical segment enbodying a second split ring ball bearing including a second inner diameter race and a second outer diameter race, the second inner diameter race and the second outer diameter race being cooperatively associated one with another so as to enable relative motion to occur therebetween; (c.) hinge means pivotably interconnecting one end of the first semicylindrical segment with one end of the second semicylindrical segment so as to enable the first and second semicylindrical segments to pivot relative to one another between an open position to permit the member to be rotated to be inserted therebetween and a closed position to permit the member to be rotated to be clamped therebetween; (d.) detachable fastening means securing the other end of the first semicylindrical segment to the other end of the second semicylindrical segment when the member to be rotated is encircled by the first and second semicylindrical segments; (e.) first gear means including a two piece driven gear, one piece of the two piece driven gear being operatively connected to the first semicylindrical segment and the other piece of the two piece driven gear being operatively connected to the second semicylindrical segment; (f.) second gear means operatively connected to the first gear means for driving the first gear means and thereby the first and second semicylindrical segments when the second gear means is being driven