Slewing ring bearings are ideal for rotating and turntable-type applications. While understanding the design and performance capabilities of a slewing ring bearing is important, it is equally important to be aware of how certain mounting surfaces affect this type of bearing.
Whether a slewing ring uses ball bearings or sliding elements to facilitate movement, failure can occur if an improper mounting surface is used. If mounted to an uneven base, the wear surface of the slewing ring bearing will receive the majority of the load in an uneven pattern, and as a result; its load-handling capabilities can be seriously compromised.
Although a mounting surface may seem level, especially if it is soft like plexiglass or a thin sheet of aluminum for example, it can deform over time, especially with cantilevered loads. A steel or heavy-metal surface is best, particularly for applications with larger slewing rings and heavier loads.