SKF bearing of high temperature can be used in the temperature range?

SKF bearing commonly applies to normal does not exceed 70 ℃. SKF bearing in scale after dealing with the stability of the temperature data are as follows: / S0 as high as 150 ℃ / S1 is as high as 200 ℃ / S2 is as high as 250 ℃ up to 300 ℃ / S3 / S4 is as high as 350 ℃ high temperature SKF bearing general level of resistance to high temperature has three levels: LT level low level high temperature of 500 ℃ high temperature 300 ℃ T CT grade high temperature 800 ℃. SKF bearing high temperature also applies to some larger temperature difference of working environment, for example its VA201 working temperature in - Between 40 to + 250 ℃. In using high temperature bearing should be cooperation at the same time the corresponding high temperature grease is also used to identify bearing grease filling type of rear code consists of a letter and two set of figures and letters show that temperature scale, followed by two Numbers indicates that the actual use of grease, common letter group is as follows: high temperature/HT fat ( - 20℃130℃） / LHT low/high temperature grease ( - 40℃140℃） / LT oil at low temperature ( - 50℃80℃） / MT medium temperature grease ( - 30℃110℃） A: 970 full ball under the high temperature resistant bearing need attention when using a: SKF why high temperature bearing damage? What are the reasons?