Full definition
Ball bearing with a fixed contact angle of 15°, 25° or 40° enabling simultaneous radial and axial load support. Mounted in pairs: O arrangement (face-to-face), X arrangement (back-to-back) or tandem for bidirectional axial loads. Series: 7200 (15°), 7300 (40°). Controlled preload for spindle rigidity. ISO 15 standard. Brands: SKF, FAG, NSK; critical for CNC machine tool spindles.