This spindle bearing carries a 15° contact angle and is designed for precise axial and radial positioning of high-speed shafts. Bore diameter is 55.0 mm, outside diameter 90.0 mm, width 18.0 mm, with a net mass of 0.391 kg. The limiting speed reaches 34000 1/min. It is manufactured to restricted tolerances (P4S) and fitted with a T-type cage, without sealing. Supplied adjusted, in pairs or sets, it is intended for mounting in matched arrangements where preload and mutual position between bearings must be maintained. The lack of sealing means external lubrication and housing protection must handle contamination control, while the restricted tolerance class and cage design support stable running accuracy and reduced heat generation at high rotational speeds.