Liebherr releases its largest bearing for compact bucket wheel excavators

Liebherr has produced the largest non-segmented, large diameter bearing ever manufactured by the company, designed for compact bucket wheel excavators.

The roller bearing slewing ring, with a 7.5 meter diameter, weighs approximately 20 tonnes.

The roller bearing was design-optimised in collaboration with Sandvik Mining and Construction Materials Handling GmbH & Co KG. Due to the new raceway system, it offers a longer service life and better emergency running characteristics.

For its production, a hardening machine in the Biberach plant in Germany was modified to allow Liebherr to produce large diameter bearings with a diameters up to 8,000 mm in the future.  The large diameter bearings can be used in mining, materials handling, and a broad variety of applications.

Site acceptance tests of the roller bearing took place in mid-June and the large diameter bearing was then delivered to a brown coal open pit mine in Hungary.

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