NTN 22218EMW33C3 SPHERICAL ROLLER BEARING

This spherical roller bearing from the ULTAGE range is designed to support high loads while compensating for misalignment. Thanks to its two symmetrical rows of rollers, it ensures uniform load distribution and high stability. This model, open and equipped with a solid brass cage, guarantees excellent performance at high speed and temperature.

Caractéristiques :
This self-aligning bearing features a cylindrical bore that facilitates direct mounting on the shaft without additional accessories. Its ULTAGE internal design provides optimized geometry and precise surface finishes. This results in extended service life and a significant reduction in friction. The internal radial clearance C3 allows for thermal expansion, ensuring reliable operation even at high temperature or speed. Its one-piece brass cage, centered on the rollers, eliminates the risk of locking related to thermal expansion and, thanks to its self-lubricating properties, limits heat buildup and ensures excellent lubricant circulation. This bearing is therefore designed to operate at high rotational speeds while maintaining high stability due to the absence of a central shoulder and the precise guidance of the rollers.

Entretien :
Regular maintenance is essential to ensure the performance of this two-row roller bearing. It requires appropriate re-lubrication depending on service conditions. The use of grease specific to the operating environment (speed, temperature, load level) is strongly recommended. The presence of an annular groove with lubrication holes facilitates access to the lubricant and extends the component's service life. Its brass cage, with self-lubricating properties, also helps limit internal heating, which reduces maintenance frequency and improves high-speed performance. Regular visual inspection allows detection of contaminants or early wear. Before each re-lubrication operation, a thorough cleaning of the housing and surrounding elements is essential to prevent particle ingress.

Etanchéité :
This model is open, meaning it does not have integrated sealing. This makes it more exposed to contaminants such as dust or moisture. In return, this design simplifies monitoring and maintenance. To compensate for this vulnerability, the lubrication groove and the holes drilled in the outer ring ensure effective re-lubrication. It is however crucial to maintain optimal cleanliness conditions during assembly and maintenance.

Informations sur la marque :
NTN is a globally recognized player in the field of bearings and transmission systems. Founded in 1918 in Japan, the brand has established itself as a leader thanks to its ability to combine innovation, engineering precision and manufacturing quality. Present in more than 30 countries, it supports industrial players with a complete and reliable offering. NTN provides technical solutions for diverse sectors such as heavy industry, aerospace, automotive and renewable energy. It is notably the originator of the Ultage technology, which embodies its constant commitment to performance, robustness and durability under the most demanding conditions.

Avantages clés :
- Supports high radial and axial loads thanks to its two symmetrical rows of rollers ;
- Self-aligning capability reducing the effects of assembly defects or shaft deflections ;
- Solid self-lubricating brass cage for improved high-speed performance ;
- ULTAGE geometry promoting extended life and optimal lubrication ;
- Cylindrical bore ensuring simple installation and good dynamic balancing ;
- Radial clearance C3 suited to applications with high loads or elevated temperatures.

Applications :
This spherical roller bearing is used in many industrial machines where mechanical stresses are high. It is well suited to presses, cable reels, hydraulic turbines or equipment in the steel industry. Thanks to its robust design, it adapts to environments with combined loads, variable speeds and fluctuating temperatures. It is particularly recommended for fixed installations where high reliability is required.