NTN-SNR offers you a wide range of universal or special self-aligning bearing units.

The NTN-SNR range of self-aligning bearing units offers a number of solutions for industrial applications that meets the criteria for cost, reliability and ease of installation.




The range of NTN-SNR self-aligning bearing units is wide, with more than 40,000 possible combinations. It covers the majority of industrial applications, providing a high quality, value for money solution.  

Installing a self-aligning bearing unit is simple and easy to do for anyone, without the need to have specialist technical skills. Indeed, they are simply: housing + bearing insert.

Each self-aligning bearing unit is made from a combination of HOUSING / BEARING INSERT, to provide the ideal solution.


The NTN-SNR range of housings sets itself apart with its large choice of designs. There are a large number of possible options: pillow block housings, flanged units, take-up housings, cartridge housings and hanger housings. In addition, our housings are designed for the simple installation of NTN-SNR bearing inserts. 

Housings in the NTN-SNR range are available in a variety of materials: grey cast iron, pressed steel, stainless steel and thermoplastic. All single-piece housings are supplied with a re-greasing system to provide for lubrication of the bearing inserts.


Bearing inserts

Bearing inserts have a spherical outer diameter. They are designed around the internal geometry of a single-row deep groove ball bearing, series 62 and 63. 
The housing has a matching spherical shaped seat in which the bearing insert sits, making it easy for them to be assembled together. NTN-SNR offers sealed, lubricated for life, bearing inserts for easy maintenance.

The self-aligning ability, in all directions, of the bearing inserts can compensate for any slight static mis-alignment of the shaft.  The various fixing methods on the extended inner ring provide very simple mounting on to the shaft. 



In addition to housings and bearing inserts, NTN-SNR offers a choice of components to increase the performance of the bearing unit:

  • protective end caps to protect against external pollution; humidity, occasional shocks, ends of the shafts…
  • floating bearing screw to compensate for shaft expansion due to temperature changes.

Self-aligning bearing units are designed to be used in a wide range of applications and machines in the industrial market. The choice depends on the use, the installation and the operating conditions to which they are subjected:

  • speed, accuracy, cost effectiveness
  • type and level of load, service temperature range
  • installation, levels of cleanliness
  • noise requirements, environmental pollution, degree of sealing
  • anti-corrosion protection, compliance with standards 
  • frequency of maintenance
  • presence of condition monitoring system

To meet requirements, the bearings have special technical features:

  • designs: split or flanged plummer block housings, take-up housings, cartridge bearing units and hanger bearing units.
  • sizes: for shafts with diameters from 12mm to 140mm
  • material: grey cast iron, stainless steel, pressed steel, thermoplastics
  • locked onto the shaft by means of: setscrew, eccentric locking collar, adapter sleeve, press-fitting
  • sealing system: lip seal, triple lip seal (L3), multiple seals (L4), contactless seal, flexible seal (ESR)
  • lubricants: standard grease, high and low temperature grease (T20, T04), food grade grease, noise quiet grease, solid lubricant


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Either with the existing range or the development of specific product, NTN-SNR is able to provide a solution for all applications, to help you with: improving operational safety, improve the productivity of your machine…

Self-aligning bearing units suitable for all industries

Self-align bearing units are particularly recommended for their suitability in the following applications and industries: 

  • handling and transport
  • agricultural and agri-food machines
  • protection of the local environment and preservation of critical locations
  • textile machines, fitness equipment, car washes
  • sawmills, woodworking machines
  • air conditioning and ventilation
  • packaging, paper and cellulose processing

NTN-SNR develops products for specific applications

For specific applications, NTN-SNR develops the perfect products 

  • in the agricultural sector, the AGR series. Bearing inserts for self-aligning housings specific for some  agricultural machinery suitable for tillage machines (roller compactors, rotary harrows, disc harrows, cultivators...).
  • for air conditioning and ventilation, the installation of bearings / bearings with ESR and CESR rubber ring ensures almost vibration-free and silent operation. In addition, these bearings require almost no maintenance.
  • in the food industry, self-aligning bearing units require specific features:
    • surfaces conformant to contact requirements
    • smooth external surfaces (no traps for dirt, food grade grease which meets the requirements of USDA H1 Food-Grade and FDA)
    • bearings without re-lubrication: solid lubricant for good protection and internal/external sealing 
    • protective end-caps for cleaning and maintenance

Do you have any questions about our NTN-SNR self-aligning bearing units? CONTACT US