INA bearings in the course of its use showed a strong regularity and repeatability is very good. Normal quality miniature bearings used in the beginning, vibration and noise are relatively small, but somewhat messy spectrum and amplitude are small, probably because some flaws in the manufacturing process, such as surface burr due.

     Exercise period of time, to maintain a certain level of vibration and noise, the spectrum is very simple, just thrown one or two multiplier. Rarely thrown more than three times the frequency spectrum, miniature bearing condition very chaotic, chaos into the working period.

     After running into use late succession, bearing vibration and noise begins to increase, sometimes appearing different sound, but the change in vibration increases more slowly this time, bearing kurtosis value starts Passed reaches a certain value. We thought, this time bearing the performance of initial failure.

     Secondly may be too large loads (preload is too large). Speed ​​is too large. Clearance is too small. Water or other foreign matter intrusion. If the above two conditions are not so that shaft, bearing housing poor precision, shaft deflection. See here, I think everyone wants to know the solution right, first of all, to study the lubricant and lubrication method, the election of miniature bearing lubricant, its dosage, but also to correct the bearing selection. Research to tie, INA bearing clearance and preload, and improved sealing device. Check the shaft and housing accuracy.

     Recommend that the bearings used, pay attention to installation, lubrication, clearance and other aspects are done as accurate as possible, in place.

     These mobile bearing failure is often caused by sudden severe catastrophic adhere to frame a sudden rupture such as bearings, INA bearing inner ring fracture deflagration that now, because there will inevitably be counterfeit bearings and devices into the enterprise. These failures will cause the rotor axle, heavy cause the rotor or destruction of equipment. In recent years, I often encounter such situations in practice. Therefore, the actual monitoring and diagnosis, must promptly diagnose bearing condition is good or bad, and timely replacement of shoddy miniature bearings, to prevent large accidents. Large number of such incidents, but also accumulated some practical tips that these bearings in the early running after installation, monitoring its vibration and spectral analysis. Found bearing in the early running, the spectrum has its own unique characteristics, namely the device frequency is generally not accounted for the main ingredients. But the vibration is not worth using vibration standards (such as ISO2372 specifications) determine the vibration is qualified
Cause I will be vigilant at this time. This state means that the presence of defects such as bearing components, the failure is often very fast and very sudden. After measuring the example in this figure that after two hours the rotor axle.

     To pay attention to the accumulation of high-quality INA bearings usually running on the device and vibration spectrum time domain case, the diagnosis of these counterfeit bearing failure. Facilitate the emergence of such abnormal spectrum can promptly determine the miniature bearing failure, prevent equipment accidents.

     Bearing fault characteristic to exhibit again in late severe fault (usually axle bearing damage such as burns, sand shelf spallation, raceway, wear beads, etc.) is not more than one week big time, equipment, greater capacity, faster speed, the distance is shorter. Therefore, in practical INA Bearing Fault Diagnosis, once found fault with advanced features, the bearing should be firmly determined there is a fault as soon as possible arrange inspection.