Bearing in the process of operation, in order to provide better performance, usually with grease lubrication bearing, can reduce the bearing friction degree and the rise of temperature, if the grease is bad, not only not related to the role of, the use of bearing may actually be worse, so we must learn how to discern when buying grease grease is bad.
Judge grease metamorphic method: 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 can no longer use, a new lubricating oil should be replaced.
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 function, if excessive wear debris, lubricating oil should be changed.
4, oil droplets trace method take a clean white 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, is the lubricant inside has many impurities, good oil powder, with the hand feels dry, smooth, and yellow.