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Unlike ordinary bearings, slewing bearings generally have mounting holes, internal or external gears, lubricating oil holes and sealing devices, so that the main engine design structure is compact, easy to guide and easy to maintain. Slewing bearings are widely used in engineering machinery, aerial machinery, handling equipment, automation machinery, special vehicles, new energy equipment, ship equipment, lifting equipment, hoisting equipment and other fields.

Since the slewing bearing of the excavator generally works under high load conditions, and the working environment of the excavator is relatively harsh, the slewing bearing is prone to failure, and the most common is various abnormal noises. So what causes the abnormal noise? What should be done to troubleshoot?