Product Overview: The NN 3068 Cylindrical Roller Bearing
The NN 3068 is a high-precision, double-row cylindrical roller bearing designed for applications demanding exceptional rigidity and high radial load capacity. With dimensions of 340x520x133mm, this bearing is a key component in heavy-duty machinery. As part of the NN 3000 Series, it belongs to our extensive range of Cylindrical Roller Bearings. The NN design features two rows of rollers and no flanges on the inner ring, allowing for axial displacement of the shaft relative to the housing in both directions. This characteristic, combined with its robust construction, makes it ideal for supporting rotating shafts in machine tools, rolling mills, and large gearboxes where precision and reliability are paramount.
Features of the NN 3068 Bearing
- High Radial Load Capacity: The double-row roller design provides excellent support for heavy radial loads.
- High Rigidity: Engineered to offer superior stiffness, minimizing shaft deflection under load and enhancing machine accuracy.
- Accommodates Axial Displacement: The inner ring is free of flanges, allowing the shaft to move axially relative to the housing to compensate for thermal expansion.
- Separable Design: The inner ring can be mounted separately from the outer ring and roller assembly, simplifying installation and maintenance procedures.
- High-Speed Capability: Optimized internal geometry ensures low friction and minimal heat generation, making it suitable for high-speed operations.
- Precision Manufacturing: Produced to tight tolerances to ensure consistent performance and reliability in demanding industrial environments.
Applications of NN 3068 Bearings
- Machine Tool Spindles: Provides the necessary rigidity and precision for main spindles in lathes, milling machines, and grinders.
- Rolling Mills: Used extensively in the work rolls and backup rolls of steel and non-ferrous metal rolling mills.
- Industrial Gearboxes: Supports gears and shafts in large, high-torque industrial transmission systems.
- Printing Presses: Ensures stable and precise rotation of heavy cylinders in large-scale printing machinery.
- Large Electric Motors and Generators: Supports heavy rotors, providing reliable operation under continuous high loads.
- Vibrating Screens and Crushers: Ideal for heavy-duty equipment in the mining, quarrying, and construction industries.
- Marine Propulsion Systems: Used in gearbox and shaft support applications where high load capacity is critical.
Benefits of Using the NN 3068 Bearing
- Enhanced Machine Performance: High rigidity improves the accuracy and output quality of machinery, particularly in precision applications.
- Increased Operational Reliability: The robust design and high load-carrying capacity reduce the risk of premature failure, leading to less downtime.
- Extended Service Life: Made from high-quality bearing steel, it offers excellent durability and wear resistance even under severe operating conditions.
- Simplified Mounting and Maintenance: The separable design facilitates easier and faster installation, inspection, and replacement.
- Improved Efficiency: Low-friction characteristics contribute to reduced energy consumption and cooler operating temperatures.
- Versatile Shaft Mounting: Often used with an H 3068 adapter sleeve, allowing for secure mounting on plain or stepped shafts.
