NSK bearing if are good of lubrication, and correct of barrier debris and the moisture, said oil seal should no wear. However, best in open bearing box Shi, check bearing and regularly sexual check oil seal. check near bearing Department oil seal of situation, to ensure they enough to prevent hot liquid or corrosion liquid or gas along axis infiltration bearing, oil seal if has wear should as soon as possible replaced.
High temperature often indicates that the bearing is in exceptions. high temperature is also detrimental to the lubricant in the bearing. sometimes bearing overheating can be attributed to the bearing lubricant. If NSK bearings in more than 125 degree Celsius temperature long-term operation, reduces the bearing life.
Bearing vibration damage to the bearing is very sensitive, such as spalling, indentation, rust, cracks, wear, are reflected in the measurement of bearing vibration, so by using a special measuring bearing vibration (frequency Analyzer, etc) can measure the size of the vibration, through frequency cannot be inferred from specific situations of exception. Measured the numerical bearing conditions of use or different sensors such as installation location and therefore require prior to analysis and comparison of measurement values of each machine are determined criteria.
Temperature of the bearing, General bearing outside of room temperature can be speculated that, if the uses of oil hole can directly measure the temperature of bearing outer ring, the more appropriate.
Usually, temperature of the bearings with NSK bearings running slowly rising, 1-2 hours later to reach a steady state. The normal temperature of the bearing due to the heat capacity of the machine, heat dissipation, speed and load to another. If lubricated, install appropriate, bearing temperature quick rise, abnormal high temperature occurs, in which case you must stop, take the necessary preventive measures.
Use heat detector to monitor bearing temperatures at any time, and alarm or stop automatically when the temperature exceeds the specified value prevents burning shaft accident.
Frequently expressed NSK bearings in high temperature anomalies. High temperatures may also be harmful to the bearing lubricant. Sometimes bearing overheating can blame on the bearing lubricant. If bearings in more than 125 ℃ temperature long-term continuous transfers reduce bearing life. Cause of the high temperature bearings include: insufficient lubrication or excessive lubrication, lubricant. Contains impurities, excessive load, bearing loss rings, insufficient clearances, and oil have high friction and so on
Cause of the NSK bearings include: insufficient lubrication or excessive lubrication, lubricant contains magazines, excessive load, bearing damage, inadequate clearance, and oil heat caused friction, and so on.
Bearing scroll body and within, and outer ring roll road surface Shang are bear cyclical pulse load of role, thus produced cycle changes of contact stress Dang stress loop number reached must numerical Hou, in scroll body or within, and outer ring roll road face Shang on produced fatigue peeling if bearing of load had large, will makes this fatigue increased also, bearing installed does not are, and axis bent, also will produced roll road peeling phenomenon bearing roll road of fatigue peeling will reduced axis of running precision, makes body occurs vibration and noise
Burn effects of tempering on bearing raceways, color burn quality reasons is lack of lubrication, lubricants in General does not meet the requirements or deterioration, as well as the bearing Assembly too tight
NSK bearing raceways and rollers do not appear on the contact surface pits, evenly, explains causes plastic deformation of the bearing is in very large static bearing load or under impact loading, local stress more than material yield limit of the working surface, which generally occurs on the low speed rotation of the bearing




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