The NTN 7913UADG/GNP42 is a high-precision angular contact ball bearing specifically engineered for demanding applications such as machine tool spindles. This bearing features a 25° contact angle, providing high axial and radial rigidity. Its dimensions are a 65 mm bore diameter, a 90 mm outer diameter, and a 28 mm width. The 'U' suffix denotes universal matching, allowing for flexible duplex arrangements (back-to-back, face-to-face, or tandem) to optimize performance. The 'ADG' indicates a duplex arrangement, while 'GNP42' specifies P4 precision (ISO Class 4), a durable polyamide cage, and light preload, ensuring exceptional accuracy, high-speed capabilities, and reliable operation in precision machinery.