Hybrid bearings

Hybrid bearings
Hybrid bearings
Hybrid bearings have rings made of bearing steel and rolling elements made of bearing grade silicon nitride (Si3N4). Because silicon nitride is such an excellent electrical insulator, hybrid bearings can be used to effectively insulate the housing from the shaft in both AC and DC motors as well as in generators.
In addition to being an excellent insulator, hybrid bearings have higher speed capabilities and provide longer bearing service life under the same operating conditions than same-sized all-steel bearings. Hybrid bearings also perform extremely well under vibrating or oscillating conditions. Often, it is not necessary to preload the bearing or apply a special grease under these conditions.


The assortment of SKF hybrid bearings comprises popular sizes for electric motors and generators (Matrix 1).
It includes:
  • single row deep groove ball bearings
    • basic design
    • sealed design
    • XL hybrid design

  • single row cylindrical roller bearings
    • hybrid super-precision angular contact ball bearings
    • hybrid super-precision cylindrical roller bearings
    • hybrid super-precision angular contact thrust ball bearings, single and double direction

  • Hybrid angular contact ball bearings
  • Hybrid stainless steel deep groove ball bearings
  • Bearing units incorporating hybrid bearings

For availability and detailed information, contact the SKF application engineering service.


Chapter "Factors that influence SKF hybrid bearing performance" should be listed in an own page and not on the landing page
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