NNU 4940 S Double Row Full Complement Cylindrical Roller Bearing | FAG Precision | High Radial Load Capacity (200x280x48 mm)

The NNU 4940 S is a premium double-row cylindrical roller bearing engineered for applications demanding extreme radial rigidity and maximum load density. Its distinctive 'NNU' designation signifies a full complement design, meaning it utilizes the maximum possible number of rollers without a conventional cage, providing the highest static and dynamic load ratings relative to its size. Manufactured to FAG's high-precision standards, this bearing ensures exceptional running accuracy, making it ideal for precision machine tool spindles, heavy-duty rolling mill stands, and critical industrial gearboxes where deflection must be minimized. The separable design allows for easy mounting and dismounting of the rings, simplifying complex maintenance procedures. Optimized for high-performance industrial environments, the NNU 4940 S features robust construction capable of handling significant shock loads and demanding operational cycles. The S suffix denotes specific external geometry modifications designed to enhance lubrication distribution and thermal stability. Its structure inherently offers superior stiffness compared to standard caged roller bearings, resulting in increased machine performance and extended service life. Choose the NNU 4940 S for critical applications requiring unmatched reliability, minimal maintenance intervention, and guaranteed dimensional stability under continuous heavy loading.

Key Features

• Maximum Radial Load Capacity: Full complement design utilizes the entire bearing space for rollers, maximizing load density.
• Exceptional Radial Rigidity: Double row configuration minimizes shaft deflection, crucial for high-precision applications like milling and grinding.
• Separable Components: Outer ring, inner rings, and roller complement are independent for simplified installation and inspection.
• Low Cross-Section: Offers high rigidity and load handling in a relatively compact envelope.
• High Precision Standard: Manufactured to P-class tolerances suitable for demanding machine tool spindles and indexing mechanisms.
• Optimized for Oil Lubrication: High static load capacity makes it suitable for heavy, slow-moving applications prone to high boundary friction.

Technical Specifications