Several measures to prevent corrosion NTN spherical roller bearing and the basic knowledge - bearing lubrication methods
NTN bearing corrosion reasons caused by various internal and external factors, induces mainly has: 1, the bearing metal surface is bright and clean degree (
The oxygen concentration cell corrosion)
2, bearing metal materials chemical composition and the structure itself.
3, bearing metal surface contact solution composition and pH value;
4, bearing using the environment temperature and humidity.
5, bearing metal surface contact of various environmental media.
6, the pH value of 5 ~ 6 sweat it.
So in order to prevent hand sweat cause corrosion, installation and production personnel should wear gloves, don't literally hand contact spherical roller bearing.
Use, NTN bearing grease is critical.
Use metamorphism grease, don't effect not only, also can damage the bearing.
1, take oil flow observation two cups, one of them need to be checked out of the lubricating oil, empty on the desktop, the other will leave the measuring cup with lubricating oil for high 30 - desktop
40 cm and tilt, let oil flow slowly to the empty cup, to observe the flow situation, good quality lubricant oil flow should be long and thin, uniform, continuous, if appear oil flow fast and slow, and sometimes has a large flow, the said lubricating oil has deteriorated.
2, hand twist to lubricating oil twist between thumb and forefinger grinding repeatedly, good lubricating oil hand feel less lubricity, wear debris, no friction, if feel fingers between the larger friction feeling such as sand, suggests that the impurity, lubricating oil should be replaced the new lubricating oil.
3, illumination method in a clear day, use a screwdriver to lubricating oil lifted, and horizontal Angle of 45 degrees.
Contrast sunshine, observe the oil situation, under the light, can see clearly without wear debris in lubricating oil is good, can continue to use, if excessive wear debris, lubricating oil should be changed.
4, oil droplets in a clean white filter paper, number of oil drops on the filter paper, after waiting for lubricating oil leakage, if the surface is black powder, touch resistance acerbity feeling, then lubricant inside has many impurities, good oil powder, with the hand feels dry, smooth, and yellow.