NK bearings are mainly used in industrial applications. These bearings feature a cageless inner ring and a needle caged outer ring, which allows for high radial load capacity.

NK bearing suffixes

NK bearings have a wide variety of suffixes that indicate different characteristics of the bearing. Let's look at the most common suffixes in more detail:

NK: standard bearing

The “NK” suffix indicates a standard needle bearing. These bearings have a cageless inner ring and a needle caged outer ring. Thanks to their shape and needle arrangement, these bearings offer excellent radial load capacity and good strength.

NKS: bearing with reinforced inner ring

The suffix “NKS” indicates a bearing with a reinforced inner ring. These bearings are used for high radial load applications and are also capable of supporting axial loads. Its construction with a reinforced inner ring increases bearing resistance.

NKI: bearing with inner ring and Allen key

The suffix “NKI” indicates a bearing with an inner ring and Allen key. These bearings are used when it is necessary to adjust the radial clearance of the bearing, for example, to avoid excessive play. The Allen key allows you to adjust the clearance precisely.

NKIS: bearing with reinforced inner ring and Allen key

The suffix “NKIS” indicates a bearing with a reinforced inner ring and Allen key. These bearings are used for high radial load applications and to adjust the bearing radial clearance. Their construction with a reinforced internal ring and Allen key to adjust the clearance makes them particularly resistant.

The various suffixes

The different letters of the NK suffix correspond to variations in the bearing's construction, which influence its performance and ability to withstand operating conditions.

For example, NK bearings are available with the suffixes “RS” and “2RS”, which indicate the presence of seals on the bearing surface. Seals help prevent bearing contamination and loss of lubricant, extending bearing life and improving performance.

The suffix “RS” indicates that the bearing is sealed on only one side, while the suffix “2RS” indicates that the bearing is sealed on both sides. The latter is particularly useful in applications where the bearing is exposed to extreme conditions, such as in the presence of liquids or chemicals.

Another common suffix is ​​“MACHINED”, which indicates that the bearing has been precisely machined and has greater resistance to mechanical stress. This type of bearing is used in applications that require greater precision and resistance to vibrations, such as in the automation sector.

Finally, the suffix “LIGHT SERIES” indicates that the bearing was designed to be lighter and more compact, with special attention to weight and size reduction. This type of bearing is used in applications that require weight reduction, such as in the aerospace and aviation industries.

Conclusions

NK bearings are a popular choice for industrial applications due to their radial load capacity and strength. By using the correct suffixes, you can find the perfect NK bearing for your application.