A revolving stage is a mechanically controlled platform within a theatre that can be rotated in order to speed up the changing of a scene within a show. A fully revolving set was an innovation constructed by the hydraulics engineer Tommaso Francini for an elaborately produced pageant, Le ballet de la délivrance de Renaud, which was presented for Marie de Medici in January 1617 at the Palais du Louvre and noted with admiration by contemporaries. Such a stage is also commonly referred to as a turntable.
Light flange slewing bearing is a special slewing ring bearing, it can have one flange in the outer ring, or one flange in the inner ring, even it can have one flange in both inner ring and outer ring. This type slewing ring is widely used in revolving stage for rotation.
Slewing bearings were originally designed to be mounted only on horizontal support structures, but can now be used successfully in vertical bearing arrangements. The forces and load distribution in slewing bearings,when subjected to axial, radial and moment,loads.
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