NSK super precision cylindrical roller bearings are designed specifically to handle large radial loads in high-speed spindle applications that require high running accuracy. Lineup Highlights Standard bearings that conform to ISO standards and specialized series for machine tools.Double-row cylindrical roller bearings with high rigidity and single-row options for high speeds.A range of NSKROBUST™ high-performance bearings for both high rigidity and ultra-high speeds. APTSURF Series High-Rigidity Double-Row Cylindrical Roller Bearings New materials and a new design enhance machine tool performance. Features High speeds/low heat generationAn optimized design increases supported speeds and decreases heat generation. Long lifeGrease lubrication extends service life. Stable rotationA highly rigid PPS resin cage restricts deformation due to centrifugal force and keeps rotation stable at high speeds. Standard Series Single-Row Cylindrical Roller Bearings NSKROBUST bearings feature a highly heat-resistant PEEK cage and heat/wear-resistant SHX steel to achieve a dmN value of 2.2 million. Features Low heat generationAn optimized design achieves low heat generation. High seizure resistanceSHX steel significantly improves seizure resistance. Optimized materials for high speedsHeat-resistant, highly rigid PEEK resin material realizes impressive high-speed performance. NSKROBUST Ultra High-Speed Single-Row Cylindrical Roller Bearings NSKROBUST bearings feature a highly heat-resistant PEEK cage and heat/wear-resistant SHX steel to achieve a dmN value of 2.2 million. Features Low heat generationAn optimized design achieves low heat generation. High seizure resistanceSHX steel significantly improves seizure resistance. Optimized materials for high speedsHeat-resistant, highly rigid PEEK resin material realizes impressive high-speed performance.