Q: Why do we use Babbitt material in bearing?

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Sheng Yao Wang (Dalian) International Trade Co., Ltd.

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A: The main alloy components of Babbitt metal are tin, lead, antimony, and copper, which are used to improve the strength and hardness of the alloy. The structural feature of the Babbitt alloy is that the hard phase particles are evenly distributed on the soft phase matrix. The soft phase matrix makes the alloy have very good embedding, compliance, and seizure resistance, and after running in, the soft matrix is concave, The hardpoints are convex outwards, which form a tiny gap between the sliding surfaces and become an oil storage space and a lubricating oil channel, which is helpful for reducing friction; the upward convex hardpoints play a supporting role and are beneficial for bearing carrying.