skf bearing damage in the form of rolling what?

Skf Roller bearing during operation, if abnormal heat, vibration and noise sudden increase of the phenomenon, that rolling bearings may have been damaged, should be checked and analyze the reasons. Common failure modes are:

1, fatigue spalling
In the rolling bearings or rolling element raceway surface, because the role of alternating load the contact surface of the metal surface was flaking, and gradually expand to form pits. If you continue to run, then the formation area of ​​spalling zone. Due to improper installation or bearing bore and shaft centerline tilt will cause the bearings to withstand greater loads and the local area early fatigue damage.
2, crack and fracture
Material defects and improper heat treatment, with the amount of interference is too large, the combination of poorly designed, such as the bearing surface with grooves caused by stress concentration, etc., will form a ring crack and fracture.
3, the indentation
When the outside durum substances into the bearing and the pressure in the rolling element and raceway between the rolling surface indentation can. In addition, excessive impact loads the contact surfaces can produce localized plastic deformation of the pits are formed. When the bearing is stationary, even if the load is small, the vibration of the surrounding environment will also be uniformly distributed in the raceway formed pits.
4, wear
When the bearing seal is not good, so that dust or particulate matter from entering the bearings, or poor lubrication, the contact surface will cause more severe scratches or wear, and bearing vibration and noise increase.
5, the current corrosion
Current through the bearing, will produce a small spark, resulting in the emergence of the contact surface of the partial annealing pits or black highlights. Serious cases will emerge into the larger pits.
6, rust
Water or acid, alkali, salts and other invasive bearings or improper selection of the lubricant from the bearing references rust, corrosion precision bearings also allow even a slight bearing scrap.
7, the cage damage
Bearing, in particular high-speed bearings, because the lack of the lubricant, the retainer ring and the rolling elements is generated at the contact wear, impact, and even lead to cage fracture.