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Bearing fault analysis, to improved work surface reliability systems engineering of important component bearing (bearing of work functions in its provides of loss, led to fault or does not work as failed of phenomenon called (corner contact ball bearing fault can is divided into according to they of normal life failed and two a early failure, this main is for points corrosion and fatigue led to bearing early failed of causes analysis and made improved recommendations, to improve bearing life and reliability.
Fatigue failure was a failure of the bearing surface forms, mainly for fatigue crack initiation and extension and fracture process, under the alternating load failures arising from the long-term effects of metals. Cracks in two ways:
When removing the check of rolling bearings, can be based on the bearing of judging injury causes of bearing failure and damage.
1. surface metal Raceway peeling
Bearing rolling element and on the inner and outer ring raceways are subjected to periodic pulse loads, resulting in cycles of exposure to stress. When the stress cycle count reaches a certain number, in the rolling elements or inner and outer ring raceways produces fatigue spalling on the face. If the angular contact ball bearing's load is too large, this fatigue can make. In addition, the bearing is not being installed, shaft bent, would also have a peeling Raceway.
Bearing Raceway fatigue spalling decreases the running accuracy of the shaft, body vibration and noise.
2. bearing burn
Burning bearing raceways and rolling elements on the temper color. Burns causes is generally insufficient lubrication, the lubricating oil quality does not meet the requirements or deterioration, and bearing Assembly too tight.
3. plastic deformation
Bearing raceways and rollers have uneven crater on the contact surface, notes bearing plastic deformation. A result of angular contact ball bearings under static and impact loads or loads of great, local stresses exceed the yield limit of material on the surface of the work, which generally occur in low-speed rotation of the bearing.
4. bearing ring cracked
Housing washer of cracks can be caused by overtightening of the bearing, bearing foreign or inner ring is loose, inclusive deformation of the bearing, install the bearing surface of poor.
5. cage fracture
The reason for this is the lack of lubrication, rolling breaks, skew, and so on.
6. cage of metal adhesion on the rolling elements
Possibly due to rolling is stuck inside the cage or insufficient lubrication.
From surface Shang see, also is from surface layer of crack, this two a target (parts carburizing, quenching and other surface heat treatment, Hou if has hardness does not uniform, organization, and non-uniform of within force and other adverse, is contact stress General is from produced instead of underground crack of effect Xia, if parts surface quality poor, exists a defects (oxidation, de carbon), friction or lubrication bad, from surface crack.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7201ATYNSULP4 NSK | 12 | 32 | 10 |
| 7201A5TYNSULP4 NSK | 12 | 32 | 10 |