Date: 2013-08-22

How to test effects of temperature modification treatment on the SKF bearing greases

In the middle of using SKF bearings, grease is critical. If bad grease was used, not only to play their rightful role, and also can damage the bearings.
1, and oil flow observation law: 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-twisted laws: lubricant twist repeated grinding between the thumb and index finger, lubricating oil with good lubricity, less debris is, friction-free, grit such as a larger sense of friction between your fingers, it indicates that the lubricating oil in the impurities, can no longer be used and should be replaced with new lubricant.
3, illumination method: in the sunny day, lubricant use screwdriver lift up, 45-degree angle with the horizontal plane. Against the Sun, observing oil droplets, in sunlight, you can clearly see no debris in lubricating oil for good may continue to function, if excessive debris, oil should be replaced.
4, traces of oil droplet method: take a clean piece of white paper filter, drip a few drops of water 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
We then look at the effect of temperature on SKF bearings, often expressed with high temperature bearings in abnormal situations. High temperatures may also be harmful to the bearing lubricant. Sometimes overheated bearings lubricant that can be attributed to the housing. If bearings are more than 125 ℃ temperature long-term continuous transfers reduce the bearing life. Cause of high temperature bearings including: inadequate or excessive lubrication lubrication, lubricant. Contains impurities, excessive load, bearing loss rings, insufficient clearances, and oil have high friction and so on.
Continuity is necessary to monitor bearing temperature, whether measured or other important parts of the bearing itself. If operating conditions do not change case, any temperature change may mean that the failure has occurred.
Periodic measurement of temperature using a thermometer, such as digital thermometers for precision measurement of bearing temperature in degrees centigrade or Fahrenheit temperature displays. Importance of SKF bearings to the effect that, when damaged, and will cause the device to shut down, so these bearings should preferably be fitted with temperature probe  

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