The four-point contact ball bearings are radial single row angular contact ball bearings featuring raceways that can handle axial loads acting in both directions. A limited radial load can be supported for a given axial load.
Four point contact ball slewing ring are widely used in various application fields, such as excavators, cranes, rotary tables & positioners, wind turbine, ladle turret furnace, ferris wheel, water treatment, slewing drive, forest machine, medical devices, mining equipment, packaging machine, radar, satellite, robotics, transporter, solar power system, stacker, reclaimer and tunnel boring machine (TBM), etc.
Four point contact ball slewing ring application in cranes is one of important load supporting parts on a crane. It is connected with slewing table weldment of complex structure and loads. With finite element method as a tool, a model of finite element calculation is set up for Four point slewing ring of truck crane and structural strength and rigidity analysis are conducted on it.
The analysis results play an instructive role for the product development design and provide an analysis and calculation basis for the selection of high strength fastening bolts.Four point contact ball slewing ring is important part of Crane Truck.According to mechanics peculiarity,a load model is built.COSMOS/Works is used for finite element analysis of four point contact ball slewing ring the analytic result is significative in product designing.
The quality and the precision of our manufacturing is the key to ensure good running after many dismantling operations of the crane. We can supply various type of crane application. Our slew bearings are supplied for ship loaders to load and un-load various commodities. It widely used in ship cranes, harbor cranes, offshore cranes, portal cranes etc.
(1). Ship Cranes
(2). Harbor Cranes
(3). Offshore cranes
(4). Portal cranes
The contact angle is usually 45°. If there is only a radial load, each steel ball contacts the raceway at four points. If there is only a unidirectional axial load,each steel ball contacts the raceway at two points. It can bear axial loads in two directions as well as a certain eccentric load, i.e. torque. Such kind of bearing has features and properties of both single-row and double-row angular contact ball bearings. If it is used in a high-speed scenario, two-point contact must be ensured for its normal working.