... ) and B (40-degree)d in pairs· Series: 70xx, 72xx, 73xx, 74xx, 79xx, 30xx, 32xx, 33xx, 38xx, 39xx, non-standard series and inch series ... than double-row designs· Double-row angular contact ball bearings principally correspond to matched pair of single-row angular contact ball bearings· Nylon 66 cage, but pressed steel ...