Excessive bearing vibration can have the same effect as irregular regreasing of bearing contact surfaces. It typically causes the grease to be broken down into the oil and the thickener. In other words, the oil separates from the thickener. It is good practice to select greases that are suitable for vibratory conditions. Your local lubricant supplier can advise you of suitable products. Also, lubricate the bearings at short intervals, perhaps as frequently as weekly, depending on bearing size, speed and operating conditions.
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Machinery Lubrication training.
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