Import bearings if in bad flow in the environment of use, bearing sealing and sealed cover is indispensable, because they can prevent dirt invaded, extend bearing life. The mill roll usually four row by sealing tapered roller bearing support. When using requirements under the strong impact load, water and the invasion of the debris.

Japan NSK company developed the super easy to seal clean roller neck bearing. This bearing in the harsh lubrication condition, and the load quantity increased by 34%, and high reliability, long life, easy maintenance. This performance improvement is to optimize the mechanical design, and the use of new materials and patent sealing technology results. And the traditional roller neck bearing, compared the seal NTN bearing roller neck bearing not only the basic dynamic load rating increased by 34%, and a longer life expectancy of 2.7 times.

Super capacity seal clean roller neck bearing to improve the performance of the second factor, which are the NSK company developed Super-TF bearing steel. This kind of material is solved in pollution or insufficient lubrication under the condition of the bearing life problem. Experience shows that, under the condition of running in pollution, bearing vulnerable to debris into and pollution. NSK company research shows that in the pollution or edge lubrication condition of bearing life can be improved through the microstructure of the bearing steel and improve. The new sealing structure give priority to seal and hole seal.

FAG in bearing creates negative pressure can cause water from the Lord seal hacked into, the structure of the suction hole seal has very big effect. Therefore, reduce the negative pressure is to prevent water bearing into basic requirements. The most effective way is to make hole seal not directly contact with water, and keep the original function-hole seal to prevent water and dirt from the side roller neck invading. INA bearing seal method the surface contact instead of line contact, whether operation process, or stationary processes, surface contact hole seal are sealing good characteristic. Therefore, the new super capacity seal clean roller neck bearing than traditional sealing roller neck bearing has higher reliability.

 
In addition, SKF bearing seal the company recently developed Italy a new generation of oil and fat sealing ring Mud Block. The optimal design of the seal structure which can effectively prevent the invasion of the earth. The traditional seal structure for a radial sealing lip, the diameter and a circle a card tight between spring and fixed seal. The new structure as bushing and sealing ring between one push flap, sealing ring outside surface of the inner diameter and bushing for rubber, inside the lip with waterproof fat pre-register the lubrication. According to the operation condition and application requirements, Mud Block can use all sorts of elastic material is made. These materials include: nitriles, poly (acrylic acid fat, fluorine combined into rubber, etc.



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