NSK thrust tapered roller bearing heating failure causes

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NSK bearings inside the grease to completely fill the oil level is too high. This causes the lubrication excessive stirring, resulting in high temperature or oil spills;
Contact (friction) seal is too dry or spring too tight; cross bearing
3, the oil level is too low, the lubricant loss from the oil seal;
4, the contact (friction) oil seals too dry or spring tight. angular ball bearing
NSK bearings inside the hole is not round; bearing box distortion; bearing surface is not flat; box hole diameter is too small angular bearing