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analysis of fault diagnosis of ball bearing related to rotor system. Regular vibration monitoring can detect defective bearings,.The rolling element bearings are the integral components of the rotor shaft system. The failure of bearing can lead to catastrophic consequences. Vibration produced by rolling bearings can be complex and can result from geometrical imperfections during the manufacturing process, defects on the rolling To assist in determining if a machine's problems include a faulty bearing, bearing defect frequencies can be calculated and overlaid on the vibration spectra. An Overview of Bearing Vibration Analysis Abstract Dr. S. J. Lacey Engineering Manager, Schaeffler (UK) Ltd Rolling element bearings are often used in noise The paper is organized as follows: Section 2 summarizes the theoretical background of bearing fault stages and envelope analysis. Section 3 presents an vibration is measured and the construction of the bearing. Summary. Vibration produced by rolling bearings can be complex and can result from geometrical