FAG NU326-E-XL-M1-C4 0192497990040 CYLINDRICAL ROLLER BEARINGS

This FAG cylindrical roller bearing offers high radial load capacity with standardized dimensions. It allows free axial compensation of the shaft and is designed for use at elevated operating temperatures.

Explanation:
• NU: Outer ring with two flanges, inner ring without flange; floating bearing design to allow axial shaft displacement in both directions
• E: Optimized internal geometry for higher radial load capacity compared with the standard design
• XL: X-life technology; improved surface quality, up to 18% higher dynamic load ratings and more than 70% longer nominal life
• M1: Two-piece brass cage, hot-riveted and roller-guided
• C4: Increased radial clearance above C3 level; suitable for press fits and applications with strong thermal expansion

Features:
The NU design allows a separable inner ring. This can remain on the shaft during disassembly while the outer ring, rollers and cage remain in the housing. This simplifies maintenance and disassembly work, since an elaborate bearing extraction is not required each time the shaft is removed.
The E design features optimized contact profiles that distribute loads more evenly and thus increase radial load capacity at identical mounting dimensions. X-life technology goes a step further: refined raceway surfaces reduce friction and heat generation. Under identical operating conditions, this significantly extends bearing life.
The M1 brass cage is assembled by hot riveting and guided on the rollers. It retains its mechanical properties even at high temperatures. The increased C4 radial clearance compensates for large thermal expansions as well as tight fits that could reduce running clearance in operation.

Maintenance:
As an open rolling bearing without integrated sealing, the choice of lubricant, lubricant quantity and maintenance intervals are critical for operational reliability. Over-greasing increases operating temperature through churning, while insufficient lubrication accelerates wear. For high-temperature applications, synthetic-base greases or greases with complex soaps are recommended.
Operating temperature is the most important monitoring parameter. Unusual vibrations or noises such as knocking, whistling or irregular running noises require immediate inspection. Before assembly, rolling elements and raceways should be cleaned thoroughly to avoid contamination. Thanks to the separable inner ring, rollers, cage and raceways can be inspected individually. At signs of pitting, spalling or deformation, the bearing must be replaced.

Strengths:
• Separable inner ring reduces maintenance effort and downtime
• X-life technology extends bearing life and increases maintenance intervals
• M1 brass cage offers high temperature resistance in applications where polymer cages reach their limits
• C4 radial clearance prevents excessive stresses in operation and increases operational safety under strong temperature gradients
• Reduced friction minimizes internal heating and reduces the load on the lubricant

Applications:
As a floating bearing, this FAG cylindrical roller bearing is suitable for applications with predominantly radial loads where temperature-induced shaft length changes must be compensated. In medium and high-power electric motors it is often used on the floating side in combination with a fixed bearing. The same applies to industrial gearboxes, centrifugal pumps and compressors.
The increased C4 radial clearance and the M1 brass cage are specifically designed for high operating temperatures and tight fits on large-diameter shafts. Typical application areas are the steel industry, cement industry and chemical industry, for example in rolling mills, rotary kilns, industrial fans, crushers, extruders and mixers.