The FAG HCS71901-C-T-P4S-UL is a high-performance hybrid spindle bearing designed for super precision applications. This single-row angular contact ball bearing features ceramic balls and steel rings, offering superior rigidity, high speed capability, and reduced friction. With an inner diameter of 12 mm, an outer diameter of 28 mm, and a width of 8 mm, it is engineered for demanding industrial environments. It has a 15° contact angle (C) and P4S super precision class, ensuring exceptional running accuracy. The bearing incorporates a textile laminate cage (T) and is universally designed (UL) for paired mounting in any arrangement, providing flexibility and optimal performance in machine tool spindles and other high-speed rotating equipment.