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Article

Is a failing bearing causing the vibration?

  • May 2012
  • Number of views: 421
  • Article rating: No rating

Gene Vogel
EASA Pump & Vibration Specialist

When machine vibration increases, one of the first questions asked is: "Is a failing bearing causing the vibration?" In the case of rolling element bearings, it is not difficult to separate vibration caused by a failing bearing from other common faults such as unbalance, misalignment, looseness, etc. But sorting out vibration from a failing rolling element bearing (here-after called "bearing vibration") from process sources such as flow induced and background vibration can be more demanding. The secret is to identify the frequency at which a flaw on a roller or raceway will impact the mating bearing component. These are commonly known as bearing fault frequencies.

Topics covered include:

  • Simple to complex steps in identifying bearing vibration
  • "Locate rpm" function
  • Occurance of sidebands

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