When applying with better lubricating material and 25% area as oil storage of alloy layer, the product has better anti-friction and lubrication, and increase the interval of refilling oil or need no oil while working.With compositing process, machining is done all at once, ensures product dimensions and tolerance accuracy.Save labor cost by omitting assembly.Save material cost by 30% by substitute bronze bush with steel or casting iron.It is widely used in pressing/forging machines, rolling steel, construction, metallurgy, mining, lifting, hoisting and other heavy machineries. Product material code, labeling method and form of compositing