FAG bearings causes of corrosion caused by a combination of intrinsic and extrinsic factors, to sum up the main are:
1, bearing the metal surface bright and clean level (difference of oxygen concentration cell corrosion).
2, bearing chemical composition and structure of the metal itself.
3 surface contacts, bearing metal composition and pH value of solution;
4, bearing the use of ambient temperature and humidity.
5, bearing metal surfaces are in contact with various environmental media.
6, human sweat it the pH value for 5~6. So in order to prevent corrosion caused by Khan, installation and production personnel should wear gloves, don′t feel self-aligning roller bearing.
FAG bearings, grease is critical. Bad grease, not only to play their rightful role, and also can damage the bearings.
1, oil-flow observation method
Take two only measuring cup, which a Sheng to be check of lubricant, another a only empty placed in desktop Shang, will Sheng full lubricant of measuring cup cite high left desktop 30-40 cm and tilt, let lubricant slowly flow to empty Cup in the, observation its flow situation, quality good of lubricant oil flow Shi should is slender, and uniform, and continuous, if appears oil flow suddenly fast suddenly slow, sometimes has large shed, is said lubricant has metamorphic.
2, hand-twist method
Lubricant twist repeated grinding between the thumb and index finger, lubricating oil with good lubricity, less debris is, friction-free, grit like a larger sense of friction between your fingers, it indicates that the lubricating oil in the impurities and should be replaced with new lubricant.
3, lighting method
On a sunny day, with a screwdriver, lubricant stir, and the horizon into a 45-degree angle. Against the Sun, observing oil droplets, in sunlight, you can clearly see no debris in lubricating oil for good may continue to be used, if excessive debris, oil should be replaced.
4, method of oil droplets traces
Take a clean sheet of white paper, drip a few drops on the paper, after the leakage of lubricant, if the surface with black powder, tart touch resistance, then the lubricant inside impurity has many good lubricating oil-free powder, feels dry and smooth with the hands, and traces of yellow.