This spindle bearing carries a 15° contact angle and is manufactured to restricted tolerances (P4S accuracy class), allowing it to be matched and mounted in pairs or sets with defined preload. Bore diameter is 30.0 mm, outside diameter 55.0 mm, width 13.0 mm, and net mass is 0.124 kg. The cage is designated T, and the limiting speed reaches 56000 1/min. The restricted tolerances and matched-set design (C) support precise axial and radial positioning under high-speed rotation, while the open construction, without sealing, requires an external supply of clean lubricant, typically oil, suited to high-speed operation. Since no integrated seals are fitted, the bearing depends on the housing arrangement to maintain contamination protection and correct lubricant film at the rated speed.