Self-moistening wear sleeve, plate; Various bearings and bushing used under heavy load and high speed, such as pump bushing, mine turbine bearing, rolling mill roller bushing.

In a general sense it refers to a bronze bushing that does not require manual lubrication. There are several methods used to achieve this characteristic, below are the 2 most common. Oil Impregnation- These are bronze bushing manufactured through the powdered metallurgy process.