Roller bearing several common failure modes

Roller bearing in the operation of the process will inevitably damage occurred, if abnormal heat, vibration and noise increase of the phenomenon of sudden, that Roller bearing may have been damaged should be checked in time and analyze causes. Common failure modes are:
     A, indentation
    When the outside world durum substances into the bearing, and pressure in between the rolling element and raceway, make rolling surface indentation. In addition, the impact of excessive load can also make contact with the surface of the formation of local plastic deformation and crater. When the bearing static, even when load is small, due to the vibration of the surrounding environment will also be in the roll form a uniform distribution of pit lane.
    B, wear
    When the roller bearing seal is not good, so that dust or particulate matter into the bearings, or poor lubrication, the contact surface will lead to more serious scratches or wear and tear, and to increase the bearing vibration and noise.
   C, corrosion
    Water or acid, alkali, salts and other invasive bearings or lubricants will quote from the improper use of corrosion bearings, precision bearings bearing even a slight corrosion will also scrapped.

   D, crack and fracture
    Material defects and improper heat treatment, with the interference is too big, poorly designed portfolio, such as the bearing surface with a trench caused by stress concentration, etc., will form a ring crack and fracture.
  
    E, current corrosion
    Current through the bearing, will produce a small spark, resulting in partial contact with the surface arising from a pit or a black annealed bright. Serious cases will occur into the large pit.
   F, cage damage 
    roller bearing, especially high-speed bearings, due to lack of lubricant, so that the cage or ring and ball contact points produce wear, impact, or even lead to cage break.

  G, fatigue spalling
    In the rolling bearing raceway or rolling surface, as alternating load bearing role of the contact surface layer of metal spalling fracture, and gradually expand to form pits. If continue to operate, it will form a regional area of spalling. Because of improper installation, or bearing hole and shaft bearings will cause the center line of tilt in the local area appears to bear a greater load and early fatigue damage.
 

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