timken bearing fault characteristic exhibited severe failure (usually, such as bearing damage, burns, sand shelf spallation, raceway, beads, etc.) is not more than one week old, equipment, larger, faster, and its shorter time interval. Therefore, the actual bearing fault diagnosis, once found fault with advanced features, should be bold and determined self-aligning roller bearing failure, fix soon.

     1, the shaft and the bearing housing tolerances choice and control: timken bearings pressed into the bearings should be flexible rotation without a sense block. If significant rotation is not flexible, it indicates that the shaft size is too large, tolerance to downward. Such as self-aligning roller bearings pressed into the shaft turned by hand obvious "imperfections" sense, it may be too much tolerance of the shaft or shaft roundness bad. So good control shaft and the bearing housing tolerance should also control the roundness, many domestic manufacturers only tolerance control, no roundness control.
 
     2, the bearing assembly methods: Because the bearings are precision products, such as improper assembly is very easy to damage the bearing channel, leading to bearing damage. Spherical roller bearings in the assembly should have a dedicated mold and can not beat the pressed into the shaft when the force only a small circle, the circle can only push a large circle force. Assembly requires the use of pneumatic or hydraulic, press-fit upper and lower mold to remain outside the state level, if inclined timken bearing channel will lead to damage due to power, leaving the bearing guide ring.

     3, the assembly to prevent foreign bodies: Bearing mounted to the rotor can easily do balancing balancing generated when the iron filings into the bearing, so it is best to do before loading the bearing dynamic balancing. There are some manufacturers in order to facilitate assembly, the assembly in the bearing chamber coated with some oil or grease lubricant effect, but the operator is often difficult to control the amount, if the oil or grease in the bearing chamber accumulates more in the self-aligning roller bearing rotation is easy timken bearing along the shaft into the interior. Bearing chamber preferably not coated with oil or grease, such as non-coated bearings shall not be have to control indoor accumulates.

     4, paint rust prevention: paint rust characterized by multiple style in sealed motor, motor in the assembly sounds good, but put in the warehouse for some time, the motor becomes very abnormal sound, remove the bearing has severe rusting. Many manufacturers will be considered a bearing problem, through our continuous publicity, and now the motor plant has been realized mainly insulating paint problems. The problem is mainly due to varnish out of the volatile acid at a certain temperature, the humidity, the formation of corrosive substances, the timken bearing channel corrosion resulting spherical roller bearing damage. The problem can only be a good selection of insulating paint, and after a period of time after drying ventilation assembly.
We should cause us to be in this defect and other countries wary of bearing assembly performance, failures tend to be very fast, very suddenly. That is two hours later, the number of examples of measurement of the rotor shaft.

     In these counterfeit bearing fault diagnosis, we should focus on high-quality equipment timken bearings are usually time-domain spectroscopy and vibration conditions, the spectrum of such an event in the abnormal accumulation of normal, in order to timely determine when aligning roller bearing failure, avoid equipment accidents.