double row ball slewing ring

Technical Guide Slewing Bearings in Crawler Cranes The rotation heart of the world's largest lifting machines Application guide from Anhui Yuanfeng What is a crawler crane? A crawler crane is a lifting machine mounted on continuous tracks instead of wheels, combining heavy lifting capacity with the ability to travel across soft or uneven ground. Large models can lift 500 to 3,000 tonnes, and their long booms make them the backbone of wind farm erection, bridge construction, refinery work, and heavy plant assembly. Every crawler crane rotates its upper structure - the cab, boom, and counterweight - on a single large slewing bearing. This bearing carries the entire lifting reaction, transmits the swing motion, and absorbs shock loads that would break lesser components. It is, quite lit...