Detailed Product Description Cylindrical Roller Bearing <1>Dimension <2>Speed Ratings <3>Weight d ... · Single row cylindrical roller bearings o Bearing series: N, NJ, NU, NUP· Double row cylindrical roller bearings o Bearing series: NN3000, NN4900 ... , NNU4900· Four row cylindrical roller bearings o Bearing series: FC, FCDmFCDP ...