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NUBS cage for deep groove ball bearing

A special cage which prevent hooting noise during vehicle cold start

The Non Uniform Ball Spacing (NUBS) cage is made to solve hooting noise issue in alternator or starter alternator at cold start. This might happens randomly with extremely low occurrence. Also the electric traction motor application can be affected.
The SKF solution equips the alternator front bearing with NUBS (Non Uniform Ball Spacing) cage.

Among the most relevant operational and environmental benefits we can highlight: 

  • keep the same bearing performance in therms of life 
  • Higher speed 
  • Noise reduction
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