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To check in the nbc bearing 6212 price bearings washed clean after. Check the raceway surface, rolling surface, with the increase of the state, cage wear, bearing clearance and the irrelevant dimension precision landing injury, abnormal. Non separation of small ball bearings, inner ring with one hand supporting degree, rotate the outer ring to confirm whether fluently.
Maintenance of the bearing. The bearing cleaning: demolition of nbc bearing 6212 price bearing maintenance, bearing the appearance of the first documented, confirm the remaining amount of lubricant, after sampling checks with a smoothing agent, wash bearings. As a cleaning agent, general use gasoline, kerosene.
Being thrust ball bearing industry, the using amount of grease the bearings for high speed wire rod mill, accounts for about 70% with the fat content. Because the lithium white that grease selected fiber soft, easy filtration thickener to do, using mineral oil as base oil, is light to satisfy the low-grade nbc bearing 6212 price bearings to reduce vibration value requirements. Another benefit is no good pumpability, whether mechanical or manual grease, grease, are simple to. Also, the price of the grease is low, can greatly reduce the cost of bearings. However, due to the use of mineral base oil, so that the outside grease is rust and antirust function of some physical and chemical target to buckle. If the bearing life can reach 200 hours, common problems of linear guide. No problem of starting and running torque is -20 ℃ test at. This kind of lubricating grease using temperature is generally -20 ~ 120 ℃, while in high temperature above 150 ℃ when using, the essential oil to excessive evaporation loss serious phenomenon, greatly shorten the thrust ball bearing service life.
Check the bearing is disassembled, can determine the fault and damage causes of bearing according to the damage of bearing.

The 1 raceway surface metal flake
Bearing rolling body and the inner and outer raceway surfaces are subjected to cyclical fluctuation of loads, resulting in periodic changes of contact stress. When the stress cycle number reaches a certain value, will produce fatigue spalling on the rolling body or the inner and outer ring raceway surface. If too large thrust ball bearing load, will exacerbate this fatigue. In addition, nbc bearing 6212 price bearing installation is not correct, shaft bending, also have a raceway spalling phenomenon. Raceway on Bearing fatigue peeling can reduce the running accuracy of the shaft, the vibration and noise mechanism.
2 bearing burn
nbc bearing 6212 price bearing burn the raceway and rolling body temper. Burn the reason is the general lack of lubrication, lubricating oil quality does not meet the requirements or deterioration, and thrust ball bearing assembly too tight.
3 plastic deformation
Uneven pits and roller roller contact surface nbc bearing 6212 price bearing, the bearing plastic deformation. The reason is that the thrust ball bearings under static load and impact load, the local stress more than material yield limit of the working surface, which generally occurs on the low speed rotation of the bearing.
4 bearing ring crack
Causes of bearing ring crack may be bearing with the tight, nbc bearing 6212 price bearing outer ring or inner loose, inclusive deformation element bearing, surface processing installation of bearing bad etc..
5 cage fragmentation
The reason is the lack of lubrication rolling crush, seat tilt.
6 keep the metal adhesion frame on the rolling body
The possible reason is the rolling was stuck in a cage or lack of lubrication.
The 7 raceway badly worn
May be in the seat ring into the foreign body, lack of lubricating oil or lubricating oil brand not appropriate.