Glossary

Babbitt is a family of soft, low-friction bearing alloys (also called white metal) used primarily as the lining material for plain (journal) bearings. It’s designed to provide a bearing surface that can conform slightly, embed small debris (so it doesn’t score the shaft), and operate with low friction when properly lubricated—while the bearing shell or housing provides the structural strength.

Babbitt alloys are typically based on tin or lead and are alloyed with elements like antimony and copper to increase hardness and load-carrying capacity. In general, tin-based Babbitt is used for higher performance and better corrosion resistance, while lead-based Babbitt is more economical but has more limitations and regulatory considerations due to lead content.

In industrial and chemical plant environments, Babbitt is common in pumps, compressors, turbines, motors, fans, and other rotating equipment where reliability matters and sliding bearings are preferred. It’s often applied as a poured, cast, or bonded lining onto a steel/bronze backing, then machined to final clearances. While it isn’t a “fastener material,” you’ll encounter it frequently in the same industrial ecosystems where bolting, flanges, and rotating equipment hardware are specified and maintained.

AKA: White Metal