1, through the surface quality of FAG bearings

　　Found a lot of customers in the sales process of FAG bearings said as long as the bearing surface of bright is good quality, this is wrong. FAG bearing bright should be the kind of glossy black surfaces, causes this glossy black FAG bearing steels are used by compliance and its grinding and cutting fluids are used, previously two of them.

　　2, chamfer is bright

　　FAG bearing a chamfer does not determine the quality of FAG bearings, but reflect the processing method of FAG bearings. Chamfering is black, stating after quenching heat treatment to increase the hardness of FAG bearings, and some people think that the chamfers are black does not look good is not processed completely, this is a misunderstanding.

　　3, good one cage two-body, while the new technology uses one cage, but it just saves material, on rotation, and other properties than the difference of the two.

　　In General, the FAG bearing service life and 3 factors to do with, is the quality of FAG bearings themselves. Second is to use the environment. Third, installation method.

　　FAG bearing failure occurs during operation is often the case, so don′t make a fuss. There have been failures, judgment and treatment is the key.

　　1.FAG bearing temperature too high

　　Agency operation, installation of FAG bearings parts allows a certain degree of temperature, when shell when touching with the hands, should not feel hot to normal, otherwise it indicates that FAG bearings temperature is too high.

　　FAG bearings causes of overheating: lubricating oil quality does not meet the requirements, or degenerate, lubricant viscosity too high body assembled too tight (lack of clearance), FAG bearing too tight; FAG bearing washer on the shaft or in the rotation; load too large; FAG bearing cage or rolling fragmentation.

　　2.FAG bearing noise

　　Roll FAG bearings allowed light running sound at work, if the sound is too loud or unusual noise or impact sound, you FAG bearings have failed.

　　Roll FAG bearing noise is caused is more complex, one of which is the bearing inner and outer rings combined with surface wear. Due to this wear, undermines the FAG bearing, bearings and shaft with shell fit led axis deviation from the correct location, abnormal sound when the axis at high speed. When tired of FAG bearings, metal peeling off its surface, also makes the FAG bearing radial clearance increases the noise. In addition, insufficient bearing lubrication, the formation of dry friction and FAG bearings broken produces abnormal noises. FAG bearings after wear loose, loose cage damage, will also have an abnormal sound FAG bearing failures.

　　When you scroll the FAG bearing teardown check, protects against judging injury FAG FAG bearings bearing failures and the cause of the damage.

　　1. surface metal Raceway peeling

　　 Intermediate ring in the FAG bearing rolling element and Raceway are subjected to periodic pulse loads on the surface, resulting in periodic variations

　　Contact stress. When the stress cycle count reaches a certain number, in the rolling elements or inner and outer ring raceways produces fatigue spalling on the face. If the FAG bearing load is too large, this fatigue can make. In addition, the FAG bearing is not being installed, shaft bent, would also have a peeling Raceway. FAG bearing Raceway fatigue spalling decreases the running accuracy of the shaft, body vibration and noise.

　　2. FAG bearing burn

　　FAG bearings burned the raceways and rolling elements on the temper color. Burns causes is generally insufficient lubrication, the lubricating oil quality does not meet the requirements or deterioration, and FAG bearing too tight.

　　3. plastic deformation

　　FAG bearing raceways and the rollers on the contact surfaces have uneven crater about FAG bearing plastic deformation. The reason for this is a FAG or a large static bearing loads under impact loading, local stresses exceed the yield limit of material on the surface of the work, which

　　Kind of situation typically occurs in low speed rotation of FAG bearings.

　　4. the FAG bearing seat cracks

　　FAG bearing washer cracks can be caused by overtightening of the FAG bearing, ring in the FAG bearing foreign or loose, inclusive deformation of FAG bearings, FAG bearings installed processing poor surface.

　　5. cage fracture

　　The reason for this is the lack of lubrication, rolling breaks, skew, and so on.

　　6. cage of metal adhesion on the rolling elements

　　Possibly due to rolling is stuck inside the cage or insufficient lubrication.

　　7. seat Raceway badly worn

　　May is a circle out of the hands of foreign objects, insufficient lubricating oil or lubricating oil brand is inappropriate.