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The jarring sound harsh sound of metal grinding sound bearing on all occasions that may occur, occurs mostly in the a greased larger models bearing, more susceptible to performance degradation of the base oil grease, almost no oil lubrication . In addition, in the winter are more prone to radial clearance occasions, when exposed to pure radial loads, prone, and different with the model size, likely to occur within a certain speed range, both occur consecutively will intermittently appear.
Method: the outer ring raceway special processing method can prevent jarring sound appear necessary choice of such bearings or appropriate to reduce the radial clearance of the bearing grease and improve performance bearings match parts rigidity. If you the bearings use process temperature is too high, you can consider whether the quality of lubricating oil to meet the requirements or deterioration of the lubricating oil viscosity is too high and other factors; or install agencies assembled tight bearing assembly too tight; bearing cage or rolling element fragmentation.
Bearing a lot of noise, one bearing inner and outer mating surface wear. Insufficient bearing lubrication, a dry friction bearings broken will produce an unusual sound.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7209ATYNP5 NSK | 45 | 85 | 19 |
| 7209A5TYNP5 NSK | 45 | 85 | 19 |