Product of DYB902 series is made of tin-bronze that is of high density. Its surface is punched with oil apertures by certain angle and density. Therefore, it is easier to form an oil film when the bush works. Moreover, it has good anti-fatigue, anti-erosion, anti-abrasion and load capacity. The products are widely applied in conditions of heavier load but low running velocity, such as on agricultural, building and engineering machines.