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Foreign bodies entering the FAG bearing has led many bearing one of the main causes of premature damage. Foreign bodies entering the FAG bearings may be when the Assembly or maintenance, or there may be impurities form entering the bearing lubricant. Inner and outer rings worn at the Raceway, rolling elements also wear, resulting in loose bearings, noise when running. Rough and hard foreign objects, like iron or other metal particles, once inside the bearings can have a minor depression, hard particles packed into the rolling element and the Raceway may cause the inner ring on the shaft rotation or rotating outer ring rolling room. Due to water, acids or other corrosive materials cause damage, you can see the exposure of Raceway surface rust reddish brown layer.
When you metamorphism of lubricants exploded, can also cause FAG bearing damage, it moves the ball and the raceways are wear and tear on a dark gray color. If the new bearing is covered with dust and debris during installation, when bearings start operation, wear occurs, keeping the rolling elements and raceways are worn simultaneously, FAG bearings became loose. While cage will have wear, loosening of increasing degree. Due to moisture or sweat of salt deposits on the bearing can also cause corrosion, this type of corrosion is a large heavy bearing little impact but great impact on small precision instruments, special note must be the moment.
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