Double Direction Thrust Ball Bearing 52000 series 1.ISO 9001 2.High quality,low price Double ... direction thrust ball bearings comprise of a shaft washer, a housing washer and a ball and cage thrust assembly. 2. ... ball bearings: bearings with a flat seat surface on the housing washer, bearings with a sphered seat surface and bearings with ... any radial load. 511,512,513,514,520,530 series bearing ...