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Under normal circumstances, the turntable bearing itself with the mounting holes, lubricants hole and sealing device to meet a variety of working conditions, the different needs of various types of host; the other hand, wheel bearings itself has a compact structure to guide the rotationconvenient, easy to install and easy to maintain and so on, are widely used for hoisting and conveying machinery, metallurgical machinery, mining machinery, construction machinery, port machinery and automated assembly line and other large rotary device.

The PRS turntable bearing, depending on the structure can be divided into different structural forms of the four-point contact ball slewing bearing, double Reducing ball slewing bearings, cross cylindrical roller slewing bearings and three-row cylindrical roller combination of turntable bearings, etc.; the above types of the bearing according to whether toothed, with teeth the distribution of parts is divided into the different structure of the toothless, external tooth and tooth type.

Turntable bearing different structural features can satisfy the needs of the work of the host under various load conditions. Among them, four point contact ball slewing bearings with high dynamic load capacity, cross-cylindrical roller slewing bearing has a high static load capacity, the combination of the three-row cylindrical roller slewing bearings to improve the carrying capacity of lead bearing the height direction various loads, respectively, to bear by the raceway and roller group, under the same loading conditions, the diameter of the bearing can be greatly reduced, and thus has a more compact so that the host, is a high carrying capacity turntable bearings.