The FAG B71917-E-T-P4S-DTL is a high-precision angular contact ball bearing designed for demanding spindle applications. This single-row bearing features an 85 mm bore, 120 mm outer diameter, and 18 mm width. It is part of the 719 series, known for its compact design and high speed capabilities. The 'E' indicates an optimized internal design, 'T' signifies a cage made of textile laminate (phenolic resin), 'P4S' denotes a special precision class (higher than P4), and 'DTL' indicates a matched pair of two bearings arranged in a tandem and light preload configuration. This bearing is suitable for machine tool spindles and other applications requiring high rigidity and accuracy.