This single row angular contact ball bearing carries the design bore of 40.0 mm, outside diameter of 80.0 mm and width of 18.0 mm, with a net mass of 0.407 kg. The X-life design provides a 40° contact angle geometry with a solid brass cage (MP), rated for a limiting speed of 15500 1/min and a reference speed of 8600 1/min. The single-row angular contact design allows the bearing to carry combined radial and axial loads in one direction, and pairs of these bearings can be mounted face-to-face or back-to-back where bidirectional axial loading is required. The solid brass cage gives stable ball guidance at higher speeds and reduces friction losses, while the X-life manufacturing standard results in tighter internal geometry tolerances, supporting smoother running and consistent load distribution across the rolling elements.