Slewing Ring Bearing For 6-Ton Truck CraneTruck cranes mainly use our slewing bearing to enhance their performance and we got very good reputation in domestic and abroad market.Truck telescopic crane requiring high stiffness with high capacity is also one of the applications where shuangzheng products make the difference by unique preloading technology. Shuangzheng slewing rings participate to the construction of thousands of buildings everyday across the world with trustworthy safety.