Maintenance methods for rolling bearings in general equipment and timing for changing lubricating grease
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Maintenance method for rolling bearings in general equipment: Clean the old, degraded lubricant using a cleaning solution or diesel, and then refill it with new lubricant. For those with sealing rings, the heating and immersion method is used. Operational precautions: (l) Be sure to clean the bearing thoroughly before use; after drying, fill the bearing’s raceways and rolling elements with grease to ensure proper lubrication. (2) The fat storage container should be clean and stored in a dry, dark place. (3) Once activated, it should be sealed properly promptly to prevent impurities from entering and affecting its performance. Timing for changing the lubricating grease: When the grease turns black, take a small amount of this discolored grease onto a piece of white paper and spread it out; impurities can be seen in it (upon close inspection, tiny metal particles may be detected). This is the time to change the lubricant. This post was last edited by zzg5680 on 2008-12-13 16:30.]
When the bearing reaches its design life, it should be replaced if conditions permit. After being in use for a certain period of time, bearings experience increased clearance due to wear between the rolling elements and the raceways; this in turn leads to an increase in rotational accuracy and vibration levels. For precision equipment, this can have adverse effects on the main unit, and in severe cases, it can be fatal. Therefore, it is necessary to replace the bearings on schedule in accordance with the operation instructions provided in the equipment manual. When replacing new bearings, there are also particular considerations regarding the filling of lubricant. First, choose the appropriate grease; second, ensure the proper amount of filling. Too little reduces the lubrication effect, while too much leads to economic waste and environmental pollution; moreover, it becomes a heat source when the bearing is operating at high speeds (due to stirring). Generally, based on the size of the space inside the bearing, filling 1/5 to 1/2 is sufficient.