What is Babbitt?

Babbitt is the name for wear-resistant alloys based on low-melting metals such as lead or tin. Babit is often used in plain bearings, so it is also called “bearing metal”.

Characteristics of Babbitt:

Babbitt is most commonly used as a thin coating on the surface of complex multi-metallic structures, but its primary use was as a monolithic cast plain bearing material. Babit alloy is characterized by its wear resistance. Babit alloy is inherently very soft, so it is less likely to wear the shaft. In addition, babit has a low coefficient of friction and good oil retention, but cannot withstand high pressure and temperature. The structure of the babit alloy is made up of small, hard crystals dispersed in a softer metal matrix, making it a metal-based composite. As the bearing wears down, the softer metal is partially worn, creating paths for the lubricant to flow between the hard-high points, which are the sliding surfaces of the bearings. When tin is used in the composition, the babit alloy becomes softer. The friction then causes the tin to melt and acts as a lubricant, protecting the bearing from wear when other lubricants are not used.

Popular Babbitt:

  1. Tin based Babbit: SnSb11Cu6

– Appearance: white ash powder

– Melting point:231.88℃

– Characteristics: good ductility

– Ingredient:
Name Sb Al Bi Sn Cu Zn As
SnSb11Cu6 10-12 0.01 0.03 Bal. 5.5-6.5 0.01 0.1
– Application:

Bearing bush, shaft plate and oil bearing, welding, solder paste, etc. can also be used for powder metallurgy, diamond products, plasma spraying and pneumatic spraying.

Superfine Babbitt alloy powder is a high-quality material for producing self-healing grease and lubricating oil.