The FAG B71904CTP4SDUL is a high-precision spindle bearing, specifically an angular contact ball bearing, designed for demanding applications requiring extreme accuracy and high rotational speeds. It features a 20 mm bore diameter, 37 mm outer diameter, and 9 mm width. This bearing has a 15° contact angle (C), a phenolic resin cage (T) for high-speed performance, and P4S super precision tolerance. The DUL designation indicates a universal duplex arrangement with light preload, suitable for mounting in pairs in any arrangement (O or X) without special matching. Ideal for machine tool spindles and other high-speed, high-precision rotating equipment.