NTN NJ212EAT2XC3 CYLINDRICAL ROLLER BEARING

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

These NTN cylindrical roller bearings support significant radial loads, provide axial location in one direction and feature a separable design that facilitates mounting. They are characterized by a polyamide cage and increased internal radial clearance.

Explanation:
• NJ: single-row cylindrical roller bearing with two shoulders on the outer ring and one shoulder on the inner ring; supports an axial load in one direction
• EA: ULTAGE™ design with increased load capacity thanks to optimized internal geometry, without increasing external dimensions
• T2X: polyamide cage
• C3: internal radial clearance greater than normal

Features:
The cylindrical roller design allows support of high radial loads due to the line contact between the rolling elements and the raceways. The NJ type, with two shoulders on the outer ring and one shoulder on the inner ring, provides axial retention of the shaft in one direction while maintaining a high radial load capacity, making it an effective solution for demanding applications.

The separable design allows the rings to be disassembled from each other, which simplifies mounting and dismounting operations, including when tight fits are required.

The ULTAGE™ range is distinguished by optimized internal geometry, which further increases load capacity and extends service life while enabling compact designs. The T2X polyamide cage combines lightness, strength and resistance to high temperatures. Finally, the C3 internal radial clearance, greater than normal, improves reliability in applications subject to tight fits, heavy loads or significant thermal variations.

Maintenance:
Appropriate lubrication for the operating conditions helps limit wear of the rolling elements and raceways. Regular checks of noise, vibration and temperature enable early detection of bearing or lubrication degradation.

Cleanliness of the lubricant and the mounting environment should be maintained to avoid introduction of contaminants. Special attention is recommended when the polyamide cage operates at high temperature with oils containing extreme-pressure additives based on sulfur or phosphorus, as these conditions can accelerate material degradation.

Key benefits:
• Supports high radial loads thanks to line contact of the rollers
• Provides axial retention of the shaft in one direction
• Facilitates mounting and dismounting operations due to the separable design
• Helps compensate for the effects of tight fits and thermal expansion thanks to C3 clearance
• Enables compact assemblies thanks to the increased load capacity of the ULTAGE™ range

Applications:
NJ.EA.T2X.C3 cylindrical roller bearings are designed to support high radial loads while ensuring axial positioning of the shaft in a single direction. Their design makes them particularly suitable for applications requiring high load capacity, high rotational speeds and good resistance to thermal stresses.

Common applications:
• gearboxes and reducers;
• mechanical transmissions;
• electric motors;
• vibrating screens;
• rolling mills;
• paper machines.

This design is particularly suited to shafts subject to tight fits or significant thermal variations. The C3 radial clearance compensates for the reduction of internal clearance due to mounting and in-service expansion. An NJ bearing can be used alone to provide axial retention in one direction, or mounted in pairs to allow axial positioning in both directions.