FAG NU2038-E-XL-M1-C3 CYLINDRICAL ROLLER BEARING

As a floating bearing, this FAG cylindrical roller bearing allows axial length compensation of the shaft without transmitting axial forces to the surrounding structure. It is particularly suitable for applications with temperature fluctuations or tight fits.

Explanation:
• NU: Two flanges on the outer ring, none on the inner ring; free axial displacement in both directions without taking up axial loads
• E: Increased radial load capacity due to optimized internal geometry
• XL: FAG X-Life design with improved contact surfaces, higher dynamic load capacity and extended service life
• M1: Two-piece brass cage, hot-riveted and roller-guided
• C3: Increased radial clearance compared with normal clearance; ideal for compensating interference fits and thermal expansion

Features:
The NU version allows the inner ring to move freely in the axial direction in both ways. During disassembly the inner ring remains on the shaft, while the outer ring, rolling elements and cage sit as a unit in the housing. This means that routine maintenance does not require complex disassembly or pull-off operations.
The E version combined with X-Life technology provides more uniform contact conditions and optimized stress distribution. The dynamic load rating can be increased by up to 18 %, while the nominal life under comparable operating conditions increases by more than 70 %. The two-piece brass cage M1 ensures effective heat dissipation and offers high corrosion resistance for demanding industrial environments. The C3 radial clearance reduces the risk of excessive internal preload during temperature rise or heavy interference fits.

Maintenance:
The bearing is supplied open and without integrated seals. Lubrication must therefore be applied during assembly and renewed regularly according to operating conditions. The choice of grease or oil depends on speed, operating temperature and load. For oil lubrication, regular checks of the oil level are required to avoid insufficient lubrication.
As this is an open rolling bearing, it must be protected from ingress of solid particles, water or chemical media by suitable external sealing systems. Careful cleaning of adjacent components before assembly further minimizes the risk of contamination.
During operation, temperature, vibration behavior and noise should be monitored. Unusual temperature rises or increased vibrations often indicate insufficient lubrication, contamination or early damage to the raceways. Regular condition monitoring using thermography or vibration analysis enables predictive maintenance and reduces unplanned downtime.

Strengths:
• Separable design facilitates maintenance because the inner ring remains on the shaft and no forced removal is required
• The increased C3 radial clearance protects against excessive preload during thermal loads and tight fits
• The M1 brass cage is suitable for high temperatures and corrosive operating environments where polyamide cages reach their limits
• The optimized internal design of the E version enables more compact bearing solutions at the same performance and reduces lubricant requirements
• FAG X-Life technology extends bearing life, reduces maintenance intervals and lowers operating costs

Applications:
This FAG cylindrical roller bearing is suitable for floating bearing positions in rotating machines with thermally induced length changes, for example in medium- and high-power electric motors, gearboxes and industrial gears. For applications with high radial loads, such as in crushing, extrusion or rolling mills, the E version offers an optimal combination of high load capacity and compact design. The M1 brass cage is particularly suitable for pumps and compressors with elevated operating temperatures or aggressive lubricants. In conveyor technology and heavy lifting and transport equipment, for example belt conveyor drums, winches or hoists, the separable construction simplifies on-site maintenance and reduces downtime.