The FAG HCS71904-E-T-P4S-UL is a high-precision hybrid spindle bearing designed for demanding applications requiring high speed, rigidity, and accuracy. This single-row angular contact ball bearing features ceramic balls (hybrid design) for reduced friction, lower operating temperatures, and extended service life. It has a bore diameter of 20 mm, an outer diameter of 47 mm, and a width of 14 mm. The bearing is manufactured to accuracy class P4S and has a 25° contact angle, making it suitable for high-speed machine tool spindles and other precision rotating equipment. The 'UL' designation indicates universal matching for paired installation.