A double-row angular contact ball bearing is basically two single-row angular contact ball bearings with 20 °Contact angles, mounted back-to-back while contained within a narrower single bearing. These bearings occupy less axial space and can take a bi-directional axial, radial and moment loads in one bearing where it takes a matched pair otherwise. NACHI Angular Contact Ball Bearing, Series: 5200, 90 mm Bore, 160 mm OD, 2 Rows, 52.4 mm Width, 20 °Contact Angle, Double Shield Closure, 138000 N Dynamic/133000 N Static Load, Pressed Steel Cage, 2700 RPM Grease/3900 RPM Oil Maximum