The FAG B71903-C-2RSD-T-P4S-UL is a high-precision sealed spindle bearing, designed for demanding applications requiring high rotational accuracy and rigidity. This angular contact ball bearing features a 17mm bore diameter, 30mm outer diameter, and a 7mm width. It is equipped with two seals (2RSD) to protect against contaminants and retain lubricant, ensuring extended service life. The 'T' suffix indicates a solid window cage made of textile laminate, and 'P4S-UL' denotes a super precision class with universal matching for light preload. Manufactured by FAG (part of Schaeffler Group), this bearing is suitable for machine tool spindles and other high-speed, high-precision rotating equipment.