FAG NJ207-E-XL-M1A-C3 CYLINDRICAL ROLLER BEARING

This cylindrical roller bearing is designed for high radial loads while providing axial guidance in one direction. The X-life version from FAG, combined with increased radial load capacity, ensures a longer service life even under demanding operating conditions.

Explanation:
• NJ: Single-row bearing with two flanges on the outer ring and one flange on the inner ring
• E: Design with optimized internal geometry for increased radial load capacity
• XL: X-life designation for optimized contact surfaces and extended service life
• M1A: Two-piece brass cage, guided on the bearing flanges
• C3: Increased radial clearance compared to the standard design to compensate for thermal expansions

Features:
This FAG cylindrical roller bearing belongs to a series specifically developed for high radial loads while providing axial guidance in one direction. The design with two flanges on the outer ring and one flange on the inner ring enables reliable axial positioning in one direction. The separable design offers significant advantages, especially during assembly operations. The inner ring can be mounted on the shaft independently of the other bearing components, while the remainder of the bearing assembly is installed separately. This considerably simplifies mounting and dismounting, particularly during hot mounting or regular maintenance operations. The optimized internal geometry and modern manufacturing technologies improve load distribution across the contact surfaces. This reduces stress peaks and supports smooth, stable operation. The two-part brass cage additionally contributes to mechanical stability and efficient heat dissipation. Thanks to the increased radial clearance C3, temperature-induced expansions are reliably absorbed and excessive internal preload is avoided.

Maintenance:
Regular inspection of the lubrication condition helps to keep the contact surfaces between the rollers and raceways in good condition. Monitoring vibrations and running noise allows early detection of unusual wear phenomena. If the bearing is exposed during maintenance work, it must be reliably protected against the ingress of dust and abrasive particles. Maintenance is significantly facilitated by the separable inner ring, as it can be pulled out freely in one direction. This improves access to the rolling elements, enabling thorough cleaning and easy inspection of the raceways for wear.

Strengths
• Up to 18 % higher dynamic load capacity compared to standard designs due to the X-life optimization
• Over 70 % longer nominal service life to reduce total operating costs
• Simplified assembly thanks to the separable inner ring
• Improved CO₂ footprint through higher energy efficiency

Applications:
FAG cylindrical roller bearings of the NJ design are used wherever high radial loads occur and axial guidance in one direction is required. Typical application areas are gearboxes and mechanical drive systems, where sustained high radial forces act on the shaft while axial positioning in one direction is sufficient for the correct function of the system. Another common application is medium- and high-power electric motors. The increased radial clearance C3 is particularly suitable here, as it compensates for thermal expansions during operation and reduces the risk of binding or seizure during the warm-up phase often caused by heating of the windings. In industrial drive systems and compressors, the combination of C3 clearance and M1A brass cage ensures reliable operation even with recurring temperature changes. The NJ design can be combined with an HJ-angle ring. This allows the bearing, depending on the design requirements, to be converted from a locating bearing with axial guidance in one direction to a fixed bearing solution. This flexibility facilitates standardization of spare parts inventories and procurement processes in plants with multiple different production lines.