The FAG HSS71905-E-T-P4S-UL is a genuine high-speed spindle bearing designed for demanding precision applications. This single-row angular contact ball bearing features a 25 mm bore diameter, 47 mm outer diameter, and 12 mm width. It is part of the 719 series, indicating a compact design. The 'E' denotes a 25° contact angle, 'T' signifies a textile laminate cage, 'P4S' indicates a higher precision class than P4, and 'UL' specifies a universal design for paired mounting with light preload. This bearing is engineered for high rotational speeds, high rigidity, and low friction, making it ideal for machine tool spindles and other high-precision rotating equipment.