Removal, Overhaul, and Identification of KOYO Bearings

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KOYO bearings are widely used in industrial applications due to their high precision and durability. However, over time, these bearings may require maintenance, repair, or replacement depending on their condition. Proper identification and handling of KOYO bearings is essential for ensuring the smooth operation of machinery and preventing unexpected failures. ### 1. Repair and Identification of KOYO Bearings When inspecting a KOYO bearing, it is important to first clean it thoroughly before conducting a detailed examination. Pay close attention to the rolling elements, raceways, cage, and inner/outer rings. The following conditions indicate that a KOYO bearing should be replaced rather than reused: - Cracks or gaps in the inner ring, outer ring, rolling elements, or cage - Cracking on the raceway or rolling elements - Severe scoring or damage on the raceway, ribs, or rolling surfaces - Significant wear or looseness in the cage, including loose rivets - Rust or physical damage on the raceway or rolling elements - Deep indentations or marks on the raceway or rolling bodies - Noticeable wear or creep on the inner or outer diameter surfaces - Obvious discoloration due to overheating - Damaged seals or dust covers in grease-sealed bearings For smaller bearings, you can hold the inner ring horizontally with one hand and check if the outer ring rotates smoothly. For tapered roller bearings and other separable types, inspect the rolling surfaces of the rollers and outer ring carefully. ### 2. Removal and Dismantling of KOYO Bearings Before removing a KOYO bearing, it's important to document its appearance and note the remaining lubricant. If the bearing is sealed, check for any damage to the seal or dust cover. When cleaning, use appropriate solvents like gasoline or kerosene. Avoid direct contact with the container to prevent contamination. During coarse cleaning, use a brush to remove grease and adhesives. Afterward, perform a fine cleaning to ensure all debris is removed. Be cautious not to damage the rolling surfaces during this process. Once cleaned, store the bearing in a clean, dry place. ### Tips for Effective Maintenance Regular inspection and proper maintenance can significantly extend the lifespan of KOYO bearings. Always follow manufacturer guidelines when handling, installing, or replacing bearings. If in doubt about the condition of a bearing, it’s better to replace it to avoid potential machine failure. ### Related Articles - Anatomy: Maintenance of technical standards for centrifugal pump bearings - The fatigue life of NTN bearings ensures the premise and consideration of the normal operation of spindle bearings - SKF Swedish bearing front and rear code (2) - Bearing and bearing steel skill requirements and production levels This article is originally published on China Bearing Network. Please visit [http://www.chinabearing.net](http://www.chinabearing.net) for more information. Previous: What are the classifications of sliding bearings? Next: The layout of the slewing bearing

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