This spindle bearing is a single-row angular contact ball bearing with a 25° contact angle, designed for adjusted mounting in pairs or sets. Bore diameter is 45.0 mm, outside diameter 75.0 mm, width 16.0 mm, with a net mass of 232.0 g. The cage is designated T, and the bearing runs without sealing, manufactured to restricted tolerances under the B7009-E-T-P4S-UL designation. The P4S accuracy class combined with restricted tolerances allows precise shaft positioning and low running error, suitable for arrangements requiring tight axial and radial guidance when mounted in matched pairs or sets. The absence of sealing means external lubrication and contamination protection must be provided by the housing design, while the 25° contact angle gives the bearing capacity to carry combined radial and axial loads in the intended paired configuration.