Abstract
Various material combinations are investigated in the form of thrust bearings in such fluids as sodium-potassium eutectic, xylene and spindle oil. It is found that with these fluids certain material combinations can be made to perform satisfactorily as hydrodynamic bearings by a process of wearing-in. With these unique combinations it is possible to obtain film thicknesses of the order of 10 × 10−6 inches by extreme wear-in. The characteristics of bearings worn in to this degree are reported and mechanisms for the observed effects discussed.

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