Slewing Bearing is a new type of mechanical parts in recent forty years rise in the world, it has inner and outer ring, a rolling body, etc. at present, our country type slewing bearing production, mainly from the beginning of 80s designated the Ministry of machinery industry Tianjin Mechanical Engineering Research Institute introducing design and manufacturing technology in the former Federal Republic of Germany Rothe Erde company.
Rotary bearing is a large bearing capable of bearing comprehensive load, which can bear large axial, radial load and overturning moment at the same time. Slewing bearing is usually equipped with mounting holes, internal gears or external gears, lubricating oil holes and sealing devices, so that the main engine can be compact in structure, easy to guide and easy to maintain. Slewing bearing without gear teeth type, four point contact ball bearing, external gear and internal gear type Double Row Angular Contact Ball Bearing cross Cylindrical Roller Bearing, crossed Tapered Roller Bearing and three row cylindrical Roller Bearing composite four series, including four point contact ball bearing with high static load capacity of cylindrical cross the roller has a high load capacity, crossed Tapered Roller bearing preloaded can make bearings with greater support stiffness and rotation accuracy, three row cylindrical roller combined bearings due to highly improve the bearing capacity of the various forces, respectively by different rolling bearing, so the same under the condition of stress, the bearing diameter greatly so it is reduced, so that the host features more compact is a slewing bearing with high bearing capacity. Slewing bearing is widely used in hoisting machinery, mining machinery, construction machinery, port machinery, marine machinery and high precision rotary equipment for radar, mechanical and missile launchers. At the same time, it can also design, develop and produce a variety of special structure rotary bearing bearing according to the specific requirements of the user.
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