A slewing bearing is a revolving bearing with gear rings drove by a motor. The slewing bearing usually is utilized in heavy machines that slowly revolves on a horizontal platform. Typically the slewing bearing was used in solar energy tracking system, crane, wind power generator, hoisting system etc.. For the highly precision slewing bearing, it can also used in construction machinery.
Types of the slewing bearing are usually into three modes: without gear, internal gear and external gear.
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