Four-point and roller bearing slewing rings with special adjacent structures are included in the category of special rings. Roller bearing slewing rings with bolt connections or bayonet connections are available for simplified disassembly of uppercarriage and undercarriage of construction machines and cranes.
The raceway systems of ball and roller bearing slewing rings can also be designed for specific applications. For example, combined roller-ball bearing slewing rings can be supplied. Slewing connections are also available as ball bearings with adjusted contact angle for large radial loads. Angular contact roller bearings, which act as bogie wheels for a heavy duty crane, have also been manufactured in Biberach.
Instead of anti-friction bearings, Liebherr also produces geared rings which are used for applications such as driving rope winches or as friction bearings for yaw adjustment of wind turbines. These gear rings are also available in segments at the customer’s request. High-precision worm gears are manufactured in Biberach for the drive system of the workpiece table in Liebherr gear cutting machines.