A Slewing Bearing arrangement consists of a single bearing that can accommodate axial and radial loads as well as tilting moments acting either singly or in combination and in any direction. To fully utilize these bearings, each of the following design considerations must be met:

• The bearing rings must be fully supported around their complete circumference and across the entire width of the axial side         faces by strong and rigid associated components  

• Strength grade 10.9 attachment bolts are used (EN ISO 898) 

• The bearing is properly sealed

Associated components 

To facilitate proper functioning of a slewing bearing arrangement, the support structure must be sufficiently strong and rigid. Furthermore the, flatness of the support surfaces must be within defined limits. For additional information about flatness tolerances

Support structure

Support structures are typically welded frames or castings. Thick-walled cylindrical structures with an inside or outside flange provide better results than thin-walled fabricated structures with a trussed frame . 

Moreover, the arrangement of the walls of the sub- and superstructure should correspond with the rolling element assembly, to optimize power transmission.  

Reference:SKF® Technical details of Slewing Bearing