Bearing seals are bearings in harsh environments the normal operation of key components, which protects the bearing against erosion and pollution, clean the bearing lubrication in good condition and prolong its life.
In general, the bearing seals a greater role than the dust cover, and by rotating flexible and low-speed rotation restrictions. Designer in choosing the appropriate seal must consider the performance of lubricants and delivery systems and expectations of working conditions.
For roller bearings in use to withstand high loads, strong impact, dust intrusion and water and rust, NSK Corporation developed a new type of ultra-high load capacity, sealed, clean and lubricated roller bearings. It is said that 34% of the load bearing capacity increases, higher reliability, can work long hours under poor lubrication conditions. The improved performance of sealed bearings, integrated design optimization mechanics, new materials and patented technology seals and easy installation.
In the ordinary sealed roller bearings, seals, and the width of the main limiting the length of the roller, which limits the load bearing capacity. Therefore, they design a new roller bearing, the cage file included in the seal gap side, the roller can longer make such cage roller extension and increase in diameter, and Cage length does not increase, reaching higher 34% of the basic rated load capacity, equivalent to 27 times to extend bearing life. The use of high-quality bearing’s" bearing steel is the key to improve bearing performance, because of impurities in the material and cause premature bearing lubrication failure uneven is the main reason.
Experience has shown that working conditions in a polluted, bearing easily into debris, and these debris particles can damage the roller, resulting in stress concentration. In addition, if the lubricating uneven, hard contact with the metal surface, resulting in small "peeling" damage, contact area can lead to stress concentration, stress concentration of these two results led to the surface of the metal parts pierced, and ultimately shortens bearing life.

 

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