NSK linear bearing right judgment rules need attention

NSK bearings in the use process showed a strong regularity, and the repeatability is very good. The normal high quality bearing ( Linear bearing) , at the beginning of the use of vibration and noise are relatively small, but there are some scattered of spectrum amplitude is small, may be due to some defects in the process of manufacturing, such as surface caused by burrs, etc. Movement after a period of time, maintain a certain level of vibration and noise, frequency spectrum is very single, only one or two times the frequency. More than three times the power frequency spectrum, seldom appears bearing condition is very stable, steady working period. Continue to run after the late into use, NSK bearing vibration and noise began to increase, sometimes a different sound, but the change of vibration increase is relatively slow, at this point, the bearing kurtosis value began suddenly reaches a certain value. NSK bearings at this time, we think, that is characterized by early failure. At this time, requires to closely monitor the NSK bearings, pay close attention to the change. Since then, bearing kurtosis value began falling fast, and is close to normal, and significant increase in vibration and noise, it began to accelerate the increase, when the vibration more than standard ( Such as ISO2372 standard) , its bearing kurtosis value also began to increase rapidly, when more than vibration standard, and kurtosis value is more than normal ( Available kurtosis relative standard) When we think of bearing fault has entered the late production, should be timely maintenance equipment, replace the linear bearing. NSK bearing fault feature late show to the severe fault ( For bearing damage, such as holding shaft commonly, burns, sand spallation, raceway, wear beads, etc. ) Most of time not more than a week, the bigger the equipment capacity, the faster the speed, the shorter the time interval. NSK bearings, therefore, in the actual fault diagnosis, the late once found the fault feature, should be decisive judgment is bearing fault, arrange inspection as soon as possible. NSK bearings in general in the bearing quality is very strong, not general bearing products can match, but there are good and bad, even bearing such as authentic Japanese production of bearing is bearing quality is much better than the domestic joint venture production, so how can we get to detect NSK bearing quality! Although the new process using one cage, but it is just to save material, and performance than the difference between the two bodies such as to rotary. In general, the service life of bearing has relationship with three factors, one is the quality of the bearing itself. The second is using the environment. Three is to install method. Bearing the chamfer does not determine the quality of the bearing, but it reflects the bearing processing method. Chamfering is black, the heat treatment such as quenching, so increase the hardness of bearing, and some people think the chamfering is black not good-looking is not process completely, this is a myth. According to the sales experience found many clients as long as the quality of bearing surface brightness is good, this is wrong. Light should be on the surface of the bearing is a kind of raven, of the cause of the raven is whether used in bearing steel standard and its cutting fluid used in the grinding process and etc, produced by the two before. Even the smiling face of dust into the bearing, invisible to the naked eye can also add bearing wear, vibration and noise. Directly with the hand take linear bearing, energetic wash hands sweat, and then coated with high quality mineral oils suspended again after the operation, in the rainy season and summer to pay more attention to special protection. NSK bearings in a special operating condition, can achieve a good at traditional battle debate, the life of a special is under the condition of light load. These special operation premise is, when the rolling surface ( Track and rolling piece) Can be separated by a lubricating oil film effectively and limiting pollutants can cause surface damage. In fact, on the premise of fantasy, the so-called for bearing life is possible.