Babbitt is a white metal alloy, or bearing material, that is typically used as a thin surface layer in complex, multi-metal structures. The original formula, created by Isaac Babbitt, was 89.3% tin, 7.1% antimony, and 3.6% copper. However, lead can sometimes replace tin.
Babbitt bearings are known for their soft composition. Though it is generally soft, it’s made up of small hard crystals that are dispersed in a matrix of softer alloy, and provides corrosion and friction resistance and excellent wetting and low wear.
Applications
Babbitt metal is used in the following applications.
- Used as the lining for bearing shells of cast iron, steel, and bronze.Â
- Bearing assembly and repair and in capacitor manufacturing
- The preferred material for use under steady load conditions in electric motors, steam and gas turbines, pumps, and blowers
Genuine Grade 2 Babbitt
This material is a lead-free alloy ideal for resurfacing Bearings and meets ASTM B23 Standards.
- Lead Free 88-90% Sn/7-8% Sb/ 3-4% Cu
- Available in notch bar, and wire
4X Nickel Babbitt
This alloy is similar to Grade 2 Babbitt, but with a little nickel added for higher tensile strength over 300F.
- 88-90% Sn/ 7-8% Sb/3-4% Cu and .3-.5%.Â
- Available in Notch bars (typically about 6lbs each)
Chemical Composition
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