The NKIB5911 Complex Bearing combines needle roller elements with an angular contact ball bearing to deliver a compact, speed solution suitable for precision machinery. Its design supports smooth rotation under demanding conditions while providing reliable radial and axial load handling in a single unit. The bearing set measures 55x80x34 mm (bore 55 mm, outer diameter 80 mm, width 34 mm), making it well suited for spaceconstrained installations. It aligns with NKIB5911 and NATB5911 configurations, with crossreferences to NATB5974911. Key benefits speed capability for fastspinning applications with consistent performance. Efficient load distribution through the angular contact design, enabling reliable radial and axial support. Compact footprint that fits limitedspace assemblies without compromising stiffness. straightforward integration in systems that use NKIB5911 or NATB5911 configurations, with crossreference NATB5974911. Key attributes Bearing type: Complex NKIB5911, Needle Roller Angular Contact Ball Bearing. Size: 55 mm bore, 80 mm outer diameter, 34 mm width. Compatibility: Designed for NKIB5911 and NATB5911 configurations; crossreference NATB5974911. Performance: Optimized for speed operation with dependable load handling in a compact form. Materials and construction: Built from precision components (specific material not stated in the description but manufactured for accuracy and durability). Applications CNC machine tool spindles and tool changers where speed and precise rotation are required. Precision gearboxes and servo motor drives needing compact bearings with robust radial and axial support. Robotic joints and automation equipment that demand speed, reliable bearing performance in a compact package. Compatibility and cross references Primary design: NKIB5911 Complex Bearing. Related configurations: NATB5911 and NKIB5911 families compatible with the NATB5974911 cross reference for replacement and servicing.