As a result of the expansion of its portfolio in the field of large-diameter bearings, Liebherr offers single-piece as well as segmented bearings with diameters of more than 6,000 mm. Large segmented bearings are mostly designed as three-row roller bearing slewing rings. The biggest one so far was produced at the Liebherr plant in Biberach. It has an outer diameter of about ten metres and a weight of about 40 tonnes. Such large bearings are mainly used in ship and offshore cranes. One of the special features of the hitherto largest roller bearing slewing rings is an integrated reduction measurement system, which reliably monitors the state of the huge bearing. Due to the size, the bearing was machined in individual segments and inductively hardened. After approximately twelve months of development and production, the complete bearing was dismantled for transportation and has already been successfully installed on site.
