NTN NJ213 CYLINDRICAL ROLLER BEARING

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

The NTN NJ type cylindrical roller bearings are designed to support significant radial loads while providing axial retention in one direction. Their separable design facilitates mounting and dismounting operations.

Explanation:
• NJ: single-row separable cylindrical roller bearing featuring two shoulders on the outer ring and one shoulder on the inner ring

Characteristics:
Cylindrical roller bearings offer high radial load capacity while allowing high rotational speeds. In particular, the NJ family includes two shoulders on the outer ring and a single shoulder on the inner ring. This configuration ensures axial retention of the shaft in one direction while preserving the advantages of cylindrical roller bearings for radial loads.

The bearing components are separable. The rings can therefore be mounted independently, which simplifies assembly and maintenance operations, especially when tight fits are required on the shaft or in the housing.

Maintenance:
This cylindrical roller bearing requires regular monitoring of the lubricant condition in order to limit wear of the contacting surfaces. Lubrication, by grease or oil, must be adapted to the operating conditions (rotational speed, load, temperature and operating environment) and renewed according to the recommendations of the installation's maintenance schedule.

Periodic monitoring of vibrations, noise and temperatures allows early detection of bearing deterioration or degradation of its environment. During maintenance operations, surfaces must be kept clean to avoid introducing contaminants that could damage the raceways and rolling elements.

Key benefits:
• Supports significant radial loads due to the line contact between the rollers and the raceways (cylindrical rollers)
• Facilitates mounting and dismounting thanks to the separable design
• Provides axial retention of the shaft in one direction
• Can be used in pairs to provide axial guidance in both directions

Applications:
NTN NJ type bearings are used in mechanisms subjected to high radial loads and high rotational speeds. Their ability to provide axial retention in a single direction makes them particularly suitable for shafts requiring partial axial positioning. When axial guidance in both directions is necessary, these bearings can also be mounted in pairs.

This design is particularly suitable for gearboxes, mechanical transmissions, reduction assemblies and many industrial pieces of equipment with heavily loaded rotating shafts, such as drive systems or certain production machines.