This single row angular contact ball bearing transmits combined radial and axial loads through raceways set at a contact angle, with 20.0 mm bore, 52.0 mm outside diameter and 15.0 mm width, weighing 0.15 kg. It is built to X-life standard, giving tighter manufacturing tolerances on the raceways and rolling elements than a standard design, and carries a steel sheet metal cage in JP execution. Limiting speed is 19300 1/min, with a reference speed of 11500 1/min. The single row angular contact design suits mounting in pairs where axial guidance in one direction combined with radial support is required; correct preload or clearance setting between paired bearings should follow the arrangement used. The steel sheet metal JP cage keeps rolling element spacing stable at speed and reduces cage mass compared with solid cage designs, supporting operation up to the stated limiting speed. As an open bearing it requires external sealing and a lubrication regime, oil or grease, suited to the reference speed and load conditions of the mounting.