What is the role slewing ring

In many mechanical devices or other products will be used in seals, mainly to prevent any leakage, the sealing effect. But why does it have to use slewing ring, what kind of effect you?
Used in slewing ring is mainly to prevent oil leakage after filling full, while preventing dust from entering the mechanical equipment outside, slewing ring prolonged use in heavy slow process, but also a decrease in ring friction effect. So on the slewing ring is still a great help, is not an integral part.
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What causes slewing angular contact ball bearing failure
Slewing tend to work both during failure phenomenon, not the normal operation. So, what causes it slewing bearing failure?
Orson slewing bearing manufacturers introduced: slewing bearing failure may be due to slewing bearing materials, structural design and manufacturing process-related. Slewing mechanical structure design needs to follow in order to protect the life of slewing ring, such as with the previous slewing used in advanced machinery, the former can not afford advanced machinery slewing radial force, there will be failure phenomenon . In the production process, heat treatment and grinding process is the leading slewing important reason for failure, so in the fabrication process must pay attention to these two processing. The last one is the material issues are based on a conventional rotary bearing metallurgical materials, will directly affect the slewing ring.
The effect is the primary cause of failure of slewing ring, so manufacturers in the production of slewing bearing slewing ring has a good choice of materials, and attention to the production process in order to produce a quality assurance slewing.