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Criteria based on the mechanical properties and the important degree and the inspection cycle and different. If the injury, Schaeffler bearing shall not be re used, must be replaced.
A) bearing parts of the fault and defect.
B) raceway surface rolling surface stripping.
Will Schaeffler bearings checked, using methods such as photographic appearance record. In addition, to confirm that the remaining amount of lubricant and lubricant sampling, and then cleaning bearings.
Cleaning the A, Schaeffler bearing rough cleaning and washing, and the metal frame at the bottom of the container placed on the use of.
B, rough when washing, use the brush in the removal of grease or oil adhesion. At this point if oil bearing, attention will be due to foreign bodies such as damage the rolling surface.
C, sperm washing, slowly rotating bearings in oil Schaeffler, be careful.
Cleaning agents are commonly used as neutral without water diesel or kerosene, sometimes using temperature as needed, such as lye. No matter what kind of cleaning agents, are often filtered clean. After cleaning, immediately in the Schaeffler bearing coating rust preventive oil or antirust grease.
To maintain good on Schaeffler bearing, prolong the service life can be.
Selection and control 1, shaft and bearing chamber tolerance: press bearing Schaeffler bearings should be flexible rotation not block a sense of. If there is obviously the rotation is not flexible, indicates that the axial size is too large, the tolerance to cut. If the bearing onto the shaft by hand after turning has obvious "rustle" sense, the tolerances of the shaft may be too large or the roundness of the shaft is not good. So in the control of the shaft and housing tolerances to control the roundness, many domestic manufacturers only on tolerance control, no control of roundness.
2, the bearing assembly: because the bearings are precision products, such as improper assembly is easy to bearing raceway damage, cause damage to the bearing. Bearing assembly shall have the special mould, can not be beat, after pressing shaft when only small force, force pressure when only circle circle. The assembly by pneumatic or hydraulic press, the upper and lower mold to outside in the horizontal state, if tilt will cause the bearing channel due to the stress damage, and the bearing guide ring.
3, to prevent foreign bodies bearing assembly: easily mounted to the rotor dynamic balance when the dynamic balance of iron filings into bearing interior, so it is best to install bearing dynamic balancing. Some manufacturers in order to convenient assembly, the assembly of some oil or grease lubrication effect in the bearing chamber painted, but the operation is often difficult to control, if the oil or grease in the bearing chamber accumulates more, in the bearing rotates easily along the shaft into the bearing internal. The bearing chamber is best not to oil or grease, such as non coated not to control may not be in the bearing chamber of accumulation.
4, rust prevention paint: paint rust is characterized by multiple sealed type motor, the motor voice in the assembly is very good, but in some time within the warehouse, the electrical noise change greatly, remove bearing with serious rust. Many manufacturers are considered to be before the bearing problem, through our advocacy, motor factory is now aware of the main insulation paint problems. This is mainly because the acidic material insulating paint volatile out of the formation of corrosive substances under certain temperature, humidity, Schaeffler bearing groove corrosion cause bearing damage. The problem can only be good choice of insulating varnish, and after drying ventilation for a period of time after the assembly.