JDB600 copper sleeve is a kind of groove Bay oil as lubrication oil of hight strength brass bearings.the product has a function of the traditionalbronze bearings,the use of high strenghth brass（ZCuZn25Al6Fe3Mn4),its hardness HB doubling the occasion so low to use teh product,than the average life span can be sxtended twice bronze sets,and its bearing pressure,can adapt to overloaded occasions.
