The INA-FAG B71904-E-2RSD-T-P4S-UL is a high-precision FAG spindle bearing designed for demanding applications requiring high rigidity and accuracy. This sealed angular contact ball bearing features a bore diameter of 20 mm, an outer diameter of 37 mm, and a width of 9 mm. It is sealed on both sides (2RSD) to protect against contaminants and retain lubricant, ensuring extended service life. The 'T' indicates a solid window cage made of textile laminate, and 'P4S-UL' signifies a super-precision class (P4S) with universal arrangement for light preload (UL). This bearing is ideal for machine tool spindles and other high-speed, high-precision rotary applications.