SKF NJ328ECJ/C3 CYLINDRICAL ROLLER BEARING

SKF cylindrical roller bearings are available in many designs, series and sizes. The major design differences between the bearings presented in this section are in:- the number of roller rows (one, two or four) - the type of cage (with, without or special designs) - Bearings with cage can accommodate heavy radial loads, rapid accelerations and high speeds. - Full complement bearings (without cage) incorporate a maximum number of rollers and are therefore suitable for very heavy radial loads at moderate speeds. - SKF high-capacity cylindrical roller bearings combine the high load carrying capacity of a full complement bearing with the high speed capability of a bearing with cage. - the configuration of the inner and outer ring flanges (position and number of guide flanges)

Suitable for mechanical drives and rotating assemblies, this SKF cylindrical roller bearing combines high load-carrying capacity with low friction. Its optimized design ensures reliable operation even under demanding operating conditions.

Explanation:
• NJ: Single-row bearing with two shoulders on the outer ring and one on the inner ring. Axial guidance in one direction
• EC: Optimized internal design with more or longer rollers. Improved load distribution
• J: Cage made of stamped steel, roller-guided. Good balance between robustness and weight
• C3: Increased radial internal clearance. Suitable for thermal expansion and interference fits

Features:
This single-row SKF cylindrical roller bearing is based on an NJ design with two shoulders on the outer ring and one on the inner ring. This configuration allows it to accommodate high radial loads while providing axial guidance in one direction. Full axial fixation can be achieved by using an HJ ring on the free side. The optimized internal design ensures even load distribution thanks to adapted rollers and a sophisticated contact geometry.
Low friction is achieved through a roller profile and contact surfaces that promote the formation of a stable lubricant film. This reduces heat generation and allows for high speeds. The separable design permits the components to be separated from each other, making assembly, disassembly and inspection significantly easier.
The roller-guided cage made of stamped steel provides reliable guidance of the rolling elements. It is designed for standard operating conditions and offers the necessary mechanical stability for numerous industrial applications.
The inner ring can be separated from the rest of the bearing (by axial displacement in one direction). This simplifies the assembly and disassembly of systems and allows targeted replacement in case of wear without needing to replace the entire bearing.

Maintenance:
Due to the open design, regular lubrication is required to ensure a lasting and effective lubricant film between rollers and raceways. It is recommended to use a grease or oil suited to the respective speed and temperature conditions. Regular inspection of the lubricant condition helps to avoid wear and overheating.
Cleaning should be performed with appropriate agents to prevent internal contamination. Particular attention should be paid to particles, as these can accelerate surface wear. Monitoring vibrations and noise is an important indicator of bearing condition. Thanks to the separable design, maintenance is facilitated because direct access to internal components is possible.
Temperature fluctuations should be controlled to maintain the internal bearing clearance. Monitoring during operation enables early detection of potential deviations, such as too tight fits or high loads.

Strengths:
• Robust: Takes high radial loads in gearboxes and mechanical assemblies
• Practical: Simplifies assembly and maintenance tasks due to separable design
• Efficient: Reduces frictional losses in high-speed applications
• Durable: Improves service life under load through optimized load distribution
• Reliable: Minimizes the risk of excessive preload during thermal expansion

Applications:
This SKF cylindrical roller bearing is suitable for mechanical assemblies with high radial loads and the need for axial guidance in one direction. It is frequently used in industrial gearboxes, gear reducers and drive systems where stable shaft guidance is required.
In electric motors and rotating machines it helps to accommodate thermal expansions while ensuring stable operation. Production equipment such as conveyor systems or machine tools also benefit from its ability to operate at high speeds with low friction.
In combination with a suitable ring it can contribute to additional axial stabilization of the shaft, particularly in complex mechanical applications.