Copper sleeve, also known as copper shaft sleeve, divided into a variety of, including machine brass roller, copper bearing. Used in all kinds of light industry, large, heavy machinery, is an important component of machinery. The product has the traditional tin bronze bearing function, takes the electrolytic copper as the raw material to match with a variety of trace metal elements, through the high temperature sintering, through the air pressure centrifugal casting processing. High hardness, excellent wear resistance, not easy to bite, good casting and cutting performance, in the atmosphere and fresh water has a good corrosion resistance. Under the condition of lack of lubricant and water quality lubricant, the property of sliding and self-lubrication is good, the property of free cutting and casting is bad, and the corrosion resistance of dilute sulfuric acid is good. Castings of simple appearance for general purpose structural parts, ships, instruments, etc., such as sleeve, bushing, bearing bush, slider, etc.