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Sep 06 2023
Crane Slew Rings: Essential Components for Crane Rotation Control
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Cross roller slewing bearing is widely used in various industries due to its various structural models, ranging from small robots, cameras, medical equipment, to various machine tools. However, most people are confused when choosing the model and structure of cross roller slewing bearing for their work. So, how to choose the right model and structure that suits your work?
Size range
It is important to know the size of the bearing you need. The outer size is a crucial parameter, which means you need to determine the size of the equipment where the bearing will be installed in order to determine the size of the bearing.
Structural form
There are many structures of cross roller slewing bearing with the same outer size. There are outer ring split type, inner ring split type, and integral structure. The key is to see where the bearing needs to be installed, which means whether it needs to rotate the inner ring or outer ring with high precision. If so, the outer ring split type must be used. Similarly, if it needs to rotate the outer ring, the inner ring split type must be used. If both the inner and outer rings require high precision, the integral structure is suitable.
Installation method
There are two types of installation methods for cross roller slewing bearing. One type is that both the inner and outer rings have installation holes like a slewing bearing, which makes the installation easier. The other type is that both the inner and outer rings do not have installation holes, and mainly rely on the bearing seat, pressing flange, and the interference fit between the shaft and bearing inner diameter.
Load capacity
It is important to determine whether the selected cross roller slewing bearing can withstand the load applied by the equipment. According to the load capacity requirements of the device design and the corresponding rated load of the bearing, it can be determined whether it is suitable.
Accuracy and clearance
The accuracy and clearance of cross roller slewing bearing are the core factors. The positive and negative clearance of the bearing can affect the rigidity, noise, service life, and speed of the cross roller.
When the working clearance is negative, the bearing has a longer fatigue life. However, with the increase of negative clearance, the fatigue clearance also decreases significantly. However, it can greatly improve the rigidity of the bearing and reduce the noise of the bearing.
When the working clearance is positive, the rotation speed of the bearing will increase. However, the bearing will also have disadvantages such as excessive noise and insufficient rigidity.
Cross roller slewing bearing is suitable for the joint or rotating parts of industrial robots, the rotating worktable of machine tools, the rotating parts of manipulators, precise rotating worktables, medical machines, measuring instruments, IC manufacturing equipment, and other fields.
The above content summarizes the problems of selecting cross roller slewing bearing from five aspects. I hope it can help you to have a certain understanding when selecting cross roller slewing bearing in the future. If you have any other questions about cross roller slewing bearing, please feel free to contact us at Swbtec.
