... Alvania R12 and so on Series1.Deep groove ball bearing: 6000series, 6200series, 6300series, 6400 series, 6800 ... roller bearing: 20000series, 21000series, 22000series, 23000series5.Cylindrical roller bearing: N series, NU series, NJ series, etc6.Pillow block bearing: ... UC series, UCP series, UCF series, UCFL series7.Self aligning ball bearing: 1200series, 1300series ...