Taizhou NSK bearings show strong regularity and repeatability in the use process. The vibration and noise of ordinary high quality stainless steel bearings are relatively ***all in the initial stage of service, but the spectrum is dispersed and the amplitude is ***all. This may be due to some defects in the manufacturing process, such as surface burrs.
After a period of movement, the vibration and noise remain at a certain level, the spectrum is very single, only one or two times the frequency. Frequencies over three frequencies rarely occur. Stainless steel bearings are in a very stable state and enter a stable working cycle.
After continuous operation, the vibration and noise of Taizhou NSK bearing begin to increase, sometimes abnormal sound occurs, but the vibration increases to the initial failure.
Firstly, the bearing spectrum analysis found that the concentration of non-ferrous metal elements was abnormal. Many sub-micron abrasive grains of non-ferrous metals h***e appeared in ferrography. Excessive water content and acid value of lubricating oil indicate the existence of bearing sleeve. The surface was corroded.
Secondly, bearing spectrum analysis found that iron content was abnormal, ferrography contained a large number of submicron iron abrasives, lubricating oil moisture and acid value were abnormal, indicating that the back of the bearing was fretting wear.
Thirdly, ferrographic analysis of stainless steel bearings contains black cutting abrasive particles or black oxide particles, and the tempering color of the metal surface indicates that the journal surface of Taizhou NSK bearings is damaged.
Fourthly, cutting abrasives are found in bearing ferrography. The abrasive composition is a non-ferrous metal, indicating that the bearing surface is damaged.
Fifth, bearing spectrum analysis found that iron concentration was abnormal, there were a large number of submicron iron particles, lubricating oil moisture or acid value exceeded the standard, indicating that the journal surface of needle roller bearings was corroded.
Now that we know the cause of bearing failure, we should pay attention to these aspects. The service life of stainless steel bearings will naturally increase.
When external hard particles enter the bearing, there will be dents on the surface between the extruder body and the raceway. In addition, excessive impact load can also cause local plastic deformation of the contact surface and form pits. When Taizhou NSK bearings are stationary, even if the load is ***all, the vibration of the surrounding environment will form uniform pits on the raceway.
When the bearing seal is not good, dust or particulate matter enters the bearing or lubrication is not good, it will cause serious wear on the contact surface, and increase the vibration and noise of stainless steel bearing.
Article from: Taizhou SKF Bearing www.wh-skf.com
Article from: Taizhou INA Bearing www.ina-China.cn
Article from: Taizhou NSK Bearing www.klbbearings.com