Because the powder metallurgy bearing is high precision products, such as improper assembly is very easy to cause damage to the bearing channel, resulting in damage to the bearing. Bearing in the assembly should have a special mold, not random beat, in the pressing axis can only be a small circle force, pressing circle circle only force. When the assembly requires the use of pneumatic or hydraulic pressure, when the pressure in the upper and lower mold to be outside in the horizontal state, if there is a tilt will cause the bearing channel due to damage, and to produce a guide bearing.

Powder metallurgy bearing mounted to the rotor dynamic balance in the easy to the dynamic balance of iron filings into the bearing internal, so it is best to before installation of the bearing dynamic balance. A number of manufacturers in order to facilitate assembly in the bearing room with some oil or grease lubrication effect, but often the operator is difficult to control the amount of good, if the oil or grease in the bearing room to stay more, when the bearing is very easy to enter the bearing. The bearing is not the best oil or grease, such as non coating is not available to control not in the bearing interior accumulates.

Paint rust is characterized by multiple in the sealing of the motor, the motor in the assembly sound is very good, but in the warehouse after some time, the motor abnormal sound great, remove the bearings have serious rust phenomenon. Before a lot of manufacturers will consider the issue of bearing, through our continuous publicity, and now the motor plant has been aware of the problem is mainly insulation paint. The problem is mainly due to the insulating paint volatile acid substances in a certain temperature, humidity, the formation of corrosive substances, the powder metallurgy bearing channel corrosion after the bearing damage. The problem can only be used as a good insulation paint, and ventilation after a period of time after the assembly.

1, tile surface corrosion: spectral analysis of abnormal findings of the non-ferrous metal element concentration; iron spectrum appeared many non-ferrous metal components of submicron wear particles; excessive water content in lubricating oil, acid value is exceeded.

2, the shaft neck surface strain: iron spectrum, there are iron line cutting abrasive particles or black oxide particles, metal surface exists temper color.

3, a shaft neck surface corrosion: spectral analysis found that iron concentration anomaly and iron spectrum has many iron composition of submicron particles and lubricating oil excessive moisture or excessive acid.

4, surface strain: iron spectrum found in cutting, grinding grain composition of non-ferrous metals.

5, tile back fretting wear: spectral analysis found that abnormal concentrations of iron and iron spectrum has many submicron wear particles of iron components and lubricating oil water content and acid value anomaly.

Under the condition of liquid lubrication, the sliding surface is separated from the lubricating oil without direct contact, so the friction loss and the surface wear can be reduced greatly, and the oil film also has a certain vibration absorbing ability.