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Bearing Grease Fundamentals: Balancing Performance and Practicality

Bearing Grease Fundamentals: Balancing Performance and Practicality

April 27, 2025

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Bearing grease, a blend of base oil, thickener, and additives, remains pivotal in machinery longevity. Lithium-based greases dominate 75% of industrial applications due to their temperature resilience (−30°C to 150°C) and water resistance. Key functions include reducing metal-to-metal contact, sealing contaminants, and preventing corrosion. Recent ASTM studies emphasize the criticality of relubrication intervals—under-greasing accelerates wear, while over-greasing causes overheating. Surprisingly, 40% of bearing failures stem from improper grease selection or degradation, per SKF data. Emerging trends favor synthetic greases for extreme conditions and bio-based alternatives to meet EU eco-regulations. In essence, optimal lubrication hinges on aligning grease properties with operational demands—a timeless engineering challenge. 

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