Plain bearing powder metallurgy parts

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The most common antifriction materials are the bearing materials used for sliding bearings. Besides antifriction properties they must possess the requisite strength, resistance to corrosion in the lubricating medium, suitability for production, and economy. Because of the difference in requirements between a bearing material forming a friction surface (antifriction capability) and a bearing part providing support (adequate strength), the bearing material is distributed on a bearing having a strong structural material as a base (steel, for example) and a friction surface consisting of a layer of antifriction material. The antifriction materials are applied to a semifinished bearing or to a continuously moving steel strip by casting; from the bimetallic thickness gauged strip, bearings (inserts and bushings) are fabricated by stamping.



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