Product Overview: The NJ 221 Cylindrical Roller Bearing
The NJ 221 is a high-capacity single-row cylindrical roller bearing engineered for superior performance in demanding industrial applications. With principal dimensions of 105mm Bore Diameter, 190mm Outer Diameter, and 36mm Thickness, this bearing is a key component in our NJ Series of Cylindrical Roller Bearings. Its specific design features two integral flanges on the outer ring and one integral flange on the inner ring, allowing it to accommodate axial displacement of the shaft relative to the housing in one direction, while also providing axial location in the other direction. This makes it ideal for applications that require heavy radial loads and single-direction axial support.
As part of the versatile NJ 2200 Series, the NJ 221 bearing is manufactured from high-quality bearing steel to ensure durability and a long service life. Its separable design, where the inner ring can be mounted independently of the outer ring and roller assembly, significantly simplifies both installation and maintenance procedures.
Key Features of the NJ 221 Bearing
- High Radial Load Capacity: The line contact between the cylindrical rollers and raceways allows for the accommodation of very high radial loads.
- Single-Direction Axial Location: Designed to locate the shaft axially in one direction, providing stable positioning for rotating components.
- Separable Design: The inner ring is separable, which simplifies mounting and dismounting processes, especially in tight-fit applications.
- Low Friction Operation: Optimized internal geometry minimizes friction and heat generation, leading to improved efficiency and longer service intervals.
- High-Speed Capability: Engineered to perform reliably at high rotational speeds, making it suitable for a wide range of machinery.
- Robust Construction: Manufactured from premium-grade, through-hardened bearing steel for exceptional toughness and wear resistance.
Common Applications of NJ 221 Bearings
- Industrial Gearboxes: Provides robust support for gears and shafts, handling the high radial forces common in transmission systems.
- Electric Motors: Used as a locating bearing on drive shafts to maintain precise rotor alignment under heavy loads.
- Pumps and Compressors: Ensures the reliable operation of rotating assemblies in various types of industrial pumps and compressors.
- Construction Machinery: Essential in heavy equipment like cranes, excavators, and transmission systems where durability is critical.
- Vibrating Screens and Crushers: Withstands the high radial loads and harsh conditions found in quarrying and mining equipment.
- Machine Tool Spindles: Offers the rigidity and precision required for main spindles in lathes, milling machines, and other machine tools.
- Wind Turbines: Utilized in the gearbox and main shaft assemblies to support immense operational loads.
Benefits of Using the NJ 221 Bearing
- Enhanced Machine Reliability: Its ability to handle heavy radial loads and provide axial location improves the stability and reliability of machinery.
- Simplified Installation and Maintenance: The separable design allows for easier handling, fitting, and inspection, reducing downtime.
- Extended Service Life: High-quality materials and a low-friction design contribute to reduced wear and a longer operational lifespan.
- Improved Operational Efficiency: Minimizes energy loss through friction, contributing to more efficient and cost-effective machine operation.
- Versatile Performance: Suitable for a broad spectrum of heavy-duty industrial applications requiring robust and reliable bearing solutions.
- Cost-Effective Solution: Offers a durable and long-lasting performance that reduces the frequency of replacements and lowers overall maintenance costs.
