NTN NJ314C3 CYLINDRICAL ROLLER BEARING

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

The NTN NJ.C3 cylindrical roller bearing supports high radial loads while providing axial guidance in one direction. Its separable design facilitates mounting, while its increased internal clearance adapts to tight fits and significant thermal variations.

Explanation :
• NJ : single-row cylindrical roller bearing, with two shoulders on the outer ring and one shoulder on the inner ring; axial retention in one direction
• C3 : radial internal clearance greater than normal clearance

Characteristics :
This bearing belongs to the family of cylindrical roller bearings: the line contact formed between the cylindrical rollers and the raceways gives it a high radial load capacity.

The NJ configuration features two shoulders on the outer ring and one on the inner ring. This arrangement allows it to withstand limited axial loads in one direction while providing axial positioning of the shaft. In addition, the separable design simplifies mounting and maintenance operations. The rings can be installed independently when assembly conditions require tight fits.

Finally, the C3 radial clearance compensates for the reduction of internal clearance caused by tight fits and the thermal expansions that occur in service.

Maintenance :
The NJ.C3 cylindrical roller bearing must be kept in a clean environment to limit the introduction of contaminants into the raceways. Regular checks of the lubricant, noise level, vibrations and temperature make it possible to detect wear or lubrication defects at an early stage. In particular, lubrication conditions the service life of the bearing: it must be appropriate for the load, speed and operating temperature.

The C3 clearance helps preserve a suitable operating clearance when tight fits or heating reduce the bearing's internal clearance. During maintenance operations, the condition of the rollers, rings and cage should be inspected to identify any signs of abnormal wear or deterioration.

Key advantages :
• Can support significant radial loads in mechanisms subject to high forces
• Facilitates mounting and disassembly operations thanks to the separable design
• Helps maintain an appropriate internal clearance in the presence of thermal expansions
• Ensures axial retention of the shaft in one direction and can be paired with a second bearing of the same type when axial guidance is required in both directions

Applications :
This cylindrical roller bearing is suited to mechanisms where radial loads are high and unidirectional axial retention is required. It is commonly used in gearboxes, mechanical transmissions and reduction assemblies.

This design is suitable for rotating shafts requiring partial axial positioning, notably in industrial production equipment, power transmission systems and certain handling machines. When axial guidance must be provided in both directions without distinction between fixed and floating bearing, NJ-type bearings can be mounted in pairs.