Self-lubricating bearing heat treatment

Self-lubricating bearings are hardened by heat treatment, which has high wear resistance and high compressive strength.

Low bronze bearing low bronze bearing material grade, chemical composition and performance. To reduce material costs, bronze can be diluted with 40% to 60% (mass fraction) iron. For self-lubricating, these bearings usually contain 5% to 13% (mass fraction) of graphite. Bearings are sintered to a minimum of combined carbon content. This type of bearing is used for light, medium and high speed conditions. They are often used in place of bronze bearings in fractional horsepower motors and appliances. When the combined carbon content exceeds the maximum, noise and hard bearings may form. "Total carbon" is defined as the sum of metallurgical carbon and free graphite.