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Abrasive wear in NTN bearings occurs when hard particles or foreign materials become trapped between the moving surfaces of the bearing. These particles can cause grooves or scratches on the contact surfaces, leading to a condition known as scuffing. Such particles may originate from internal components of the machinery or be introduced through lubricants or external sources. This type of wear is particularly common in environments where contamination is not well controlled.
Adhesive wear, on the other hand, happens when microscopic irregularities on the contact surfaces cause localized welding due to high friction and heat. In severe cases, this can lead to surface deformation, micro-welding, and even partial melting of the metal. As a result, parts of the welded area may tear away from the base material, causing cracks and increased plastic deformation. This process is known as adhesive wear, and it can range from minor scratches to more serious damage called "seizing" when the situation becomes extreme.
Understanding these wear mechanisms is essential for maintaining the performance and longevity of NTN bearings. Regular inspection, proper lubrication, and contamination control are key preventive measures that can significantly reduce the risk of both abrasive and adhesive wear.
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Analysis of Wear Failure of NTN Bearings
Source: China Bearing Network | Date: March 10, 2014