Determining the Wear of Various Rolling Bearings

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Rolling bearings are essential components in many mechanical systems, and understanding how to assess their wear is crucial for maintaining performance and preventing failures. Here's a detailed guide on evaluating the condition of different types of rolling bearings. (1) **Radial Ball Bearings** To determine if a radial ball bearing is in good condition, first inspect the inner and outer raceways for any signs of chipping, peeling, or severe wear. The raceways should have a smooth, even surface with no deep grooves or scratches. The balls must be perfectly round, without cracks, discoloration, or damage. The cage should be intact, not loose or broken. When you hold the inner ring and rotate the outer ring, it should turn smoothly with only a slight sound of the balls rolling along the raceway. There should be no wobbling or sudden stopping. If there’s excessive play (more than 0.03 mm), the bearing should not be used anymore. (2) **Tapered Roller Bearings** After use, check the tapered roller bearings for any signs of damage. Ensure that the rollers and inner raceway do not show signs of detachment, and that the cage is not too loose. The edges of the inner ring should remain intact, and the outer raceway should not have cracks. Once the inner ring and rollers are installed inside the outer ring, the rollers should sit centered in the raceway, with no more than 1.5 mm forward movement. If any of these conditions are not met, the bearing should be replaced. (3) **Spherical Roller Bearings and Cylindrical Roller Bearings** These bearings typically have separable outer rings. Under normal conditions, the raceways and rollers should be free from cracks, pitting, or deep wear. The cage should not be deformed and should keep the rollers properly aligned. The clearance between the raceway and the roller should not exceed 0.06 mm. Any deviation from this standard indicates that the bearing may need replacement. (4) **Thrust Ball Bearings** For thrust ball bearings, check both raceways for damage or excessive wear. The balls should be free from cracks or pitting, and the cage should remain undistorted. The balls must be securely held in place by the cage, with no looseness or misalignment. If the raceways are damaged or the balls are worn, the bearing should not be used. --- Maintaining the health of your bearings can significantly extend the life of your machinery. Regular inspection and proper maintenance are key to identifying early signs of wear before they lead to costly failures. If you're interested in learning more about bearings, check out our other articles: - How to shape the rolling bearing ring of a full-complement cylindrical roller bearing? - Multi-angle analysis of sliding bearing interference fit This article was originally published on China Bearing Network. For more information, visit [China Bearing Network](http://www.chinabearing.net). Previous: The difference between SKF bearings Next: Bearing basics; English and Chinese terminology for bearings

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