The FAG B71911-C-T-P4S-DBL is a genuine FAG high-precision angular contact ball bearing, specifically designed as a spindle bearing for demanding industrial applications. It features an inner diameter of 55 mm, an outer diameter of 80 mm, and a width of 13 mm. This bearing has a 15° contact angle (C), indicating suitability for high-speed applications with combined radial and axial loads. It is equipped with a textile laminate cage (T) and belongs to the P4S tolerance class, ensuring very high running accuracy. The DBL suffix denotes a duplex bearing set arranged back-to-back with a light preload, optimized for rigidity and precision in machine tool spindles.