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Selecting the correct bearing seal

  • August 2011
  • Number of views: 3241
  • Article rating: No rating

Tom Bishop, P.E.
EASA Senior Technical Support Specialist

The primary functions of a bearing seal are to keep lubricant in the bearing and bearing chamber, and to exclude contaminants from that area. The dis­cussion in this article relates to seals that are external to the bearing and therefore not a part of the bearing itself.

Key factors in bearing seal selection include:  

  • The type of lubricant (oil or grease)
  • The type of bearing (rolling or sleeve)
  • Shaft surface speed, connection to load (e.g., direct-coupled or belted)
  • Seal friction and consequent heat­ing
  • Physical space available

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Categories: Bearings, Lubrication
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