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      Regular lubrication maintenance for Bearings in Operation

      2013-08-19
      ?Appropriate lubrication and maintenance may bring about the longest lifetime to the bearing.

      1. Grease lubrication
      Further lubrication of the bearing should be conducted during the planned equipments shut down period and replenished regularly. In the meantime, clear away the used grease or squeeze it out through the oil drain hole. Before putting in new grease, clean the lubricator fitting. If the bearing housing does not have a lubricator fitting, open the bearing housing cover or the end cap to clear out the used grease. After cleaning, replenish the bearing with new grease of the same model.
      2. Oil lubrication
      Periodically inspect the oil level and quality of the lubricating oil. Generally, normal oil levels should be within the range of 1/3-2/3 of the oil level window or oil level mark. If filling oil with an oil cup, the oil level indicator is only for the filling oil capacity. Even if the oil level of the bearing box meets the requirements of operation, filling oil may be considered while oil level in the oil cup is lower than one quarter of its total volume.
      Inspection methods and Fill Oil. Take out a small amount of oil as a sample and compare it to the new oil. Companies may conduct oil analysis to ensure its quality. If the sample is cloudy and misty, it might be mixed with water, widely known as emulsified oil. In this case, it should be replaced. If the sample is dark or thick, it indicates that the oil might have begun carbonizating. In this case, the used oil should be thoroughly replaced. If possible, use oil to wash off the oil-way. Ensure the replaced oil is the same model with the used oil and replace it to the required oil level.
      If the oil temperature is below 60℃(140°F)and the oil is not polluted, it needs to be replaced once a year for an oil bath system. If the oil temperature is 60-100℃(140-210°F), it needs to be replaced 4 times a year. If oil temperature is 100-120℃(210-250°F), the oil needs to be replaced once every month. If oil temperature is above 120℃(250°F), it needs to be replaced once every week.
      ?Correct installation and maintenance are important factors to bearing’s smooth operation. In addition, it is important to keep the bearing clean. It must be protected from the contamination and moisture. The bearing should be correctly installed and lubricated. Attention should be paid to the bearing adjustment, seal conditions, lubrication and lubrication replacement cycle and maintenance.

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