Babbitt’s Metal

Babbitt’s metal is a bearing alloy originally patented by Isaac Babbitt. The classic composition of Babbitt’s metal is:

• 50 parts tin
• 5 parts antimony
• 1 part copper

The addition of lead can significantly extend the range of service of this alloy. The composition of Babbitt’s metal can vary widely depending on specific requirements, with typical ranges including:

• Tin: 5-90%
• Copper: 1.5-6%
• Antimony: 7-10%
• Lead: 5-48.5%

This alloy is known for its excellent antifriction properties, making it ideal for use in bearing applications.