Precision angular contact ball bearing designed for high-speed rotation with a contact angle of 15°, matched for mounting in pairs or sets to achieve defined preload. Bore diameter is 25.0 mm, outside diameter 47.0 mm, width 12.0 mm, and net mass 76.76 g. The cage is executed in version T, restricted tolerances (P4S) ensure running accuracy required for spindle applications, and the bearing is supplied without sealing. The restricted tolerance class and matched-set design allow this spindle bearing to run true under combined axial and radial load while maintaining low internal clearance suited to precise shaft guidance. Without integrated sealing, protection of the bearing environment and lubricant retention must be provided externally, and lubrication has to be selected and applied according to the operating speed and preload configuration used when installing the set. The T cage supports stable ball guidance at the elevated speeds typical for this bearing type.