NTN NUP310EAT2XU CYLINDRICAL ROLLER BEARING

Suited to high radial loads and to use as either a floating or fixed bearing, cylindrical roller bearings offer low friction and good rigidity. They are available in a wide range of models and variants designed for specific contexts: heat, axial displacement, operating noise, speed, capacity, etc.

This family of NTN cylindrical roller bearings combines an ULTAGE™ design, an NUP fixed-bearing architecture and a T2X polyamide cage. This combination increases load capacity and service life while retaining the external dimensions of a standard bearing.

Decryption :
- NUP: single-row cylindrical roller bearing with two shoulders on the outer ring and a fixed shoulder associated with a separable shoulder ring on the inner ring.
- EA: ULTAGE™ design with enhanced load capacity achieved by increasing the number, diameter and length of the rollers within a standard envelope.
- T2X: glass-fiber reinforced polyamide cage.
- U: NTN designation suffix associated with NUP-type bearings in this range.

Features :
The NUP architecture of these bearings allows them to carry significant radial loads while providing axial retention of the shaft in both directions. This axial guiding capability makes these bearings widely used as fixed bearings in mechanical transmissions. As the separable shoulder ring is removable, the inner ring must be axially secured during assembly.

The EA design from the ULTAGE™ range complements this architecture by increasing the rollers' diameter, length and number without changing the bearing's external dimensions. This optimization increases load capacity while keeping the same external envelope as a standard bearing. The combination of large-diameter rollers, the optimized roller generatrix profile and the ULTAGE™ internal geometry also helps increase service life while improving allowable speeds.

The T2X glass-fiber reinforced polyamide cage contributes to this performance aim. Its low mass reduces inertial forces on the rolling elements while its wear resistance and sliding properties limit abrasion at the roller guidance. The material's moderate moisture absorption increases its flexibility and resilience, which improves shock resistance and facilitates assembly. This design also helps reduce noise levels compared with some metal cages.

Maintenance :
Maintaining the performance of these bearings depends on appropriate lubrication. The choice of lubricant must therefore take into account operating temperature, rotational speed, applied loads and the operating environment. It must also consider the composition of the additives used to ensure compatibility with the polyamide cage. Particular attention should be paid to oils containing sulfur- or phosphorus-based extreme-pressure additives, which can alter the material properties at elevated temperature.

Maintenance operations include monitoring noise, vibrations, operating temperature and lubricant condition. An abnormal change in any of these parameters can indicate inadequate lubrication, contamination or an alignment problem.

Special attention must be paid to the service temperature, which should remain between -20 °C and 120 °C. During inspections, it is recommended to check the condition of the glass-fiber reinforced polyamide cage, whose mechanical properties may change as a result of prolonged exposure to high temperatures, humidity or certain incompatible lubricants.

Key benefits :
- Ensures axial retention of the shaft in both directions within a fixed bearing.
- Handles high radial loads without increasing external dimensions.
- Enables compact assemblies thanks to the reinforced ULTAGE™ design.
- Eases assembly thanks to its separable design.
- Helps reduce noise and wear related to roller guidance.
- Suitable for high-speed mechanisms when lubrication conditions are appropriate.

Applications :
These cylindrical roller bearings are primarily used as fixed bearings in industrial transmissions and gearbox shafts. Their ability to axially retain the shaft in both directions allows control of shaft position while supporting significant radial loads.

Common application areas include industrial gearboxes, gearmotors, conveyors, material handling equipment and various mechanical transmissions. The increased load capacity provided by the ULTAGE™ design enables transmission of high forces in assemblies where available space is limited.

These bearings are also suitable for high-speed machines when component alignment is properly controlled and lubrication conditions are compatible with the characteristics of the polyamide cage. Because the permissible misalignment is limited, these bearings are intended for assemblies where shaft and housing alignment is well controlled.