This single row angular contact ball bearing carries axial and radial loads acting in one direction, with a 40° contact angle typical of the B design. Bore diameter is 40.0 mm, outside diameter 68.0 mm, width 15.0 mm, and net mass 0.18 kg. The X-life designation indicates optimized internal geometry for higher load carrying capacity within the same envelope dimensions. The bearing uses a TVP cage made of glass-fiber reinforced plastic, guided on the balls, which reduces friction and supports smooth operation at the limiting speed of 5400 1/min. Sealing on both sides (2RS) retains grease inside the bearing and blocks contaminants, making relubrication unnecessary during service life. Due to the single-direction contact angle, this bearing is typically mounted in pairs to accommodate axial loads from both sides, and paired arrangements benefit from consistent internal geometry provided by the X-life design. The plastic cage construction suits moderate to high speed operation while keeping mass low.