This single row angular contact ball bearing carries a solid brass cage (MP) and belongs to the X-life design line, providing raceway and rolling element geometry manufactured to tighter tolerances than standard execution. Bore diameter is 45.0 mm, outside diameter 85.0 mm, width 19.0 mm, with a net mass of 0.455 kg. Limiting speed is 14300 1/min, reference speed 8000 1/min. The contact angle of this bearing type allows it to take up combined radial and axial loads acting in one direction, so shaft arrangements typically use it paired against a second angular contact bearing to control axial play in both directions. The brass cage gives stable ball guidance at the stated speed values and withstands higher operating temperatures than a pressed steel cage, which suits applications running near the upper end of the limiting speed. As supplied open (without seals or shields), the bearing requires external lubrication and protection from contamination at the mounting location, and the X-life tolerances allow it to be paired with matching bearings for defined preload in duplex or set arrangements.