Common conditions, nsk bearing grease filling, always beyond the demand for the practice of directly involved in lubrication, full shelves and rolling mill bearings to cover the cavity of the form a contour, and in the periphery of the rolling element. In this process, because the resistance of the excess grease, the bearing temperature rise very fast.
 
Although most of the excess grease is squeezed out early in the operation, and squeeze the grease in the roller attachment is still possible migration changes in rolling element into the raceway.

The early stages of bearing operation at the mill, most of the grease quickly (less than a minute) was out of the raceway, while the accumulation of Paul grease followed bearing migration cycle of changes in body also, in succession a small amount of discharge. Then nsk bearing temperature continues to rise, go together until the excess grease all be discharged, may be called grease phase, according to the quality of the grease in the rolling mill bearing structure, filling factor, this time may last more than a dozen minutes, as well as a few hours.

NSK bearing life:

a.NSK Bearings Cleanliness is a big influence on bearing life, bearing company has therefore conducted a special experiment, the result is the difference of even several ten times higher than The higher the cleanliness of the bearing, the longer life expectancy and other tests show that: the cleanliness of the lubricant on the ball bearing life. Therefore, to improve the cleanliness of the lubricating oil can extend the life of the rolling mill bearing, In addition, if the lubricating oil containing dirt particles is controlled at below 10um and bearing life into multiples of growth.

b, the impact on noise and vibration:

Vibration: NSK bearing test results show that: cleanliness seriously affect the level of vibration of rolling mill bearings, especially in high-frequency band of vibration is more significant. The cleanliness of the bearing vibration speed is low, especially in the high frequency band.

c, the lubricating properties of:

NSK Bearings decline in the cleanliness of not only affects the formation of lubricant film can also cause the deterioration of the grease and accelerate its aging, thus affecting the grease lubrication performance.



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