What materials are commonly used for bearings to decrease friction?

Bronze and polymer composites are commonly used for bearings to decrease friction due to their unique properties. Bronze is a metal alloy made primarily of copper and tin, known for its strength, wear resistance, and ability to withstand high loads while maintaining low friction against rotating shafts. This makes bronze an excellent choice for applications where durability and reliability are essential.

Polymer composites, on the other hand, combine the advantages of plastic with the performance characteristics of traditional materials. These composites are lightweight, resistant to corrosion, and can reduce friction significantly compared to metal bearings. They often require less lubrication, which is beneficial for maintenance and can lead to longer service life.

Together, bronze and polymer composites provide options that balance performance, longevity, and resistance to environmental factors, making them preferable materials in many bearing applications.