The NSK 7011A5SN24TRSULP3 is a genuine NSK high-precision angular contact ball bearing, specifically designed for demanding machine tool spindle applications. This bearing features a 55 mm bore diameter, 90 mm outer diameter, and 18 mm width, ensuring robust performance. Manufactured with P3 precision (ISO Class 4), it offers exceptional rotational accuracy and rigidity, crucial for high-speed and high-accuracy operations. The 'A5' designation indicates a 15° contact angle, optimized for combined radial and axial loads. The 'SN24' refers to a specific cage design, and 'TRSUL' signifies a universal matching for duplex or triplex arrangements, allowing for flexible mounting in O or X configurations with light preload. This bearing is ideal for applications requiring superior reliability and performance in precision machinery.