Double Row Ball Slewing Bearing

  • double row different ball size slewing bearing without gear 020.25.500

    double row different ball size slewing bearing without gear 020.25.500

    Turntable bearing, also known as slewing bearing, is a kind of large bearing which can bear large axial load, radial load and overturning moment at the same time. Turntable bearings are usually equipped with mounting holes, internal or external gears, lubricating oil holes and sealing devices, so that the main engine structure design is compact, the guide is reliable and the maintenance is convenient.

    There are four point contact ball bearings with or without teeth, external teeth and internal teeth, double row angular contact ball bearings, cross cylindrical roller bearings, cross tapered roller bearings and three row cylindrical roller combined rotary bearings. Among them, four point contact ball bearing has higher static load capacity; cross cylindrical roller bearing has higher dynamic load capacity; cross tapered roller bearing can make bearing have greater support rigidity and higher rotation accuracy through pre interference.

    Rotary bearing is widely used in hoisting machinery, mining machinery, construction machinery, port machinery, ship machinery, high-precision radar machinery and missile launcher and other large rotary devices.

  • Internal gear double row different ball diameter slewing bearing 023.40.1250

    Internal gear double row different ball diameter slewing bearing 023.40.1250

    The rise of turntable bearing stems from the need of low speed and heavy load and the action of large size and large angle of rotation. It is said that slewing bearing is a kind of large bearing with special structure, which can bear large axial load, radial load and overturning moment at the same time, and has multiple functions such as support, rotation, transmission and fixation. The slewing bearing device can bear a lot of loads, including working load, dead weight load, slope load, collision load, temperature load and so on. The following is a clear analysis of the load of various slewing bearing devices.

  • double row ball slewing bearing with different ball diameter 021.40.1400

    double row ball slewing bearing with different ball diameter 021.40.1400

    The double row ball type slewing bearing has three seat rings. The steel ball and isolation block can be directly discharged into the upper and lower raceways. According to the force condition, two rows of steel balls with different diameters are arranged.

    This kind of open assembly is very convenient. The bearing angles of the upper and lower arc raceways are 90 ° and can bear large axial force and overturning moment. When the radial force is greater than 0.1 times of the axial force, the raceway must be specially designed. The double volleyball type slewing bearing has large axial and radial dimensions, and has a solid structure. It is especially suitable for loading and unloading machinery such as tower crane and truck crane with medium or above diameter.