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  • Aluminum-Alloy Bearings
    and conformability. For automotive use, considerable improvement in antiscoring characteristics and embeddability is obtained by using a thin-lead babbitt or electrodeposited lead-tin overlay. Aluminum bearing alloys are used either as solid cast material or as aluminum strips (normally from 0.02 to 0.125
  • Bronze and Copper-Alloy Bearings
    or powder-metallurgy techniques, a steel backing is used with copper-lead bearings for increased strength. These bearings are also frequently used with a babbitt overlay in a three-layer construction. The hardness of copper-lead materials is similar to that of babbitt at room temperature, but is higher
  • Tin
    . These low-friction materials may contain high percentages of antimony (to 10%), copper (to 10%), or aluminum (to 80%). They include babbitt metal,
  • Bearing Wear
    and self-lubricated bearings wear much faster than fluid-film bearings. Self-lubricating plastic bearings wear at higher rates than boundary-lubricated, metal-alloy bearings. In reciprocating load application, babbitts are subject to fatigue damage in which pieces of the babbitt metal spall out of the surface
  • Bearings take the heat
    alloyed with a metal such as copper, babbitt, bronze, or nickel. Speed and load limits are set by a conventional = bearing load in psi and = shaft speed in surface ft/min. is about 12,000 for dry operation

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