![]() ![]() As mentioned above, although Babbitt offered optimum surface behavior, it lacked fatigue strength. The earliest insert bearings were Bi-metal construction with a lining of Babbitt. This reaction to cyclic loading is called “Fatigue.” Bearings are typically constructed with a steel backing to provide support and allow the bearing shells to be an interference fit with their housing. Under the repeated cyclic loading of an internal combustion engine Babbitt will break up and flake out. By itself, in thick layers, Babbitt cannot carry high loads for long periods. ![]() Babbitt is also very slippery which minimizes friction in the absence of oil during startup.Īlthough Babbitt is the best bearing material based on its surface behavior, it has one serious shortcoming. This softness also allows Babbitt to absorb dirt and wear particles that might pass through the bearings clearance space. It’s soft which allows it to conform to minor imperfections in geometry and alignment of mating parts. Babbitt has physical properties similar to solder. The first commonly used bearing material was an alloy of lead, tin, antimony and arsenic called “Babbitt” which was named after its inventor. Clevite Cam Bearing part number: SH-1981 (Standard) ![]()
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