With the cooperated research of our customers, we have successfully developed bearings for the wheels, rollers, lifting arms, hydraulic cylinder bushings for the construction machineries including boundary lubricating bi-metallic bushings, metallic bushings and metal-polymer composite bushings. These bushings are made with the optimized wear resistance and dust protection features. The self-lubricating characteristics of the bearings provided considerable savings by extending maintenance periods and therefore reducing maintenance down time.