A slewing ring bearing can be designed for use in applications where loads originate from a single direction or multiple directions relative to its axis of rotation. All of these loads can be resolved into four resultant loads acting on, about, or through the bearing’s center. They are referred to as radial, axial, moment and torque. These are used to evaluate the size and capacity of the bearing and integral gear if one is incorporated.
Load originated by the equipment and work being conducted is transmitted to the bearing through the mounting structure and mounting bolts. While slewing ring bearings have the ability to accept all types of load combinations, they are primarily designed for loads aligned parallel to the bearing’s axis of rotation. These axial or thrust loads originate from a source located at a distance from the bearing’s axis of rotation and also generate a moment load about the bearing’s center.
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