double row different ball size slewing bearing without gear 020.25.500
The double row slewing bearing has three races. The steel ball and isolation block can be directly discharged into the upper and lower raceways. Two rows of steel balls with different diameters are arranged according to the stress condition. 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 axial and radial dimensions of double row spherical slewing bearing with different diameters are relatively large and the structure is tight. It is especially suitable for tower crane, truck crane and other loading and unloading machinery with medium or above diameter.
There are many forms of slewing bearing, but their structure composition is basically the same. Outer ring (toothed or toothless),. Sealing belt,. Rolling element (ball or roller), oil nozzle, plug, plug pin, inner ring (toothed or toothless), spacer or cage, mounting hole (threaded or smooth).
According to different structural types, turntable bearings can be divided into four point contact ball turntable bearings, cross cylindrical (tapered) roller turntable bearings, double row four point ball turntable bearings, double row reduced diameter spherical slewing bearings, ball roller combinations and three rows of cylindrical roller combined turntable bearings. The above bearings are divided into toothless ones according to whether they are toothed or not and the distribution of teeth There are different structures, such as type, external tooth type or internal tooth type.
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2. We devote ourselves to the R &D of customized slewing bearing with high precision,special purpose and requirements.
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