... 3)Promot delievey time 4)Good service roller bearing 1. Deep groove ball bearing 6000 ... -6422 2. Self-Aliging Ball Bearing 12 series 13series 15series 16series 3. Cylindrical roller bearing NJ, NU ... NJ2334M NU/NJ724M-- NU/NJ 728M 4. Pherical roller bearings (21000, 22000, 23000, 24000, 29000 Series ... ) 5. Tapered roller bearings (30000 series and Inch Size) 6. Thrust ...