Contact fatigue failure refers to the working surface of cylindrical roller bearing subjected to alternating stress arising from failure. Contact fatigue spalling occurs in NSK bearings surface, often accompanied by fatigue crack, first from the contact surface following the largest alternating shear stress ­, and then extended to different Flake shapes formed on the surface, peeling or pitting corrosion such as point to point, shallow spalling in the Peel into small flakes. Due to the peeling surface gradually expanded, and often deep extended, forming deep peeling. Deep contact fatigue failure fatigue spalling is ­ source.
Wear failure refers to the relative sliding friction between the surfaces lead to their working surfaces of metal wear and failure. Cylindrical roller bearing parts gradually to damage caused by wear, and eventually lead to loss of NSK bearing dimensional accuracy and other related issues. ­ Wear may affect the shape change, increased clearance and surface morphology changes may affect the lubricants or lubrication caused pollution reaches a certain level functionality completely lost, thus depriving the bearing of rotating accuracy, as well as not being used often operate.
1, axle bearing, overhaul, maintenance and dealing with exceptions
In good condition for as long as possible in order to maintain original performance of NSK bearings, maintenance, overhaul, in order to prevent accidents, it is imperative, ensuring the reliability of operation, increase production, economy. Maintenance best corresponding mechanical running condition of operational standards, conducted on a regular basis. Contents include, monitor the operation condition, supplementary or replacement of the lubricant, demolished checks on a regular basis.
As a matter of maintenance in operation, a rotation of the cylindrical roller bearing tone, vibration, temperature, lubricant status, and so on.
2, NSK bearing failures and countermeasures
In General, if proper use of cylindrical roller bearing, you can use up to reach fatigue life. But there will be accidents injury prematurely, less resistance to the use case. This early injury, as opposed to a fatigue life, known as the quality limits of failures or accidents. Installed, used, lubrication of origin does not note that foreign objects from external intrusion, axis, case study on thermal effect of insufficient, and so on.
Bearing damage, such as: roller bearing rings of ribs cards hurt, may consider as reasons, lack of lubricant, inappropriate, for oil discharge structure of defect, foreign bodies penetrated, NSK bearing large misalignment, shaft deflection, also for these reasons coincide.
Therefore, only investigated injury, it is difficult to know the real causes of injury. However, if you know the bearing condition of used machinery, used, constructed around a cylindrical roller bearing, understand the situation before and after the accident, combined with NSK bearing damage and several reasons why visits, you can prevent the recurrence of similar accidents.



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