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TIMKEN bearings if in harsh environments, bearing seals and sealing cover is essential, because they prevent dirt intrusion, extending bearing life. Mill rolls usually consists of four sealed tapered roller bearings. When using a strong impact load required to withstand water and debris intrusion.
TIMKEN bearings can cause a negative pressure generated in the water invasion from the main seal, seal the hole structure has a great influence on the negative. Therefore, reducing the
TIMKEN bearing the negative pressure to prevent water from entering the basic requirements. The most effective method is to seal the hole is not directly in contact with water, while maintaining the original function of the sealing hole - prevent water and dirt from the roll neck side intrusion. Sealing method using surface contact instead of line contact, whether it is during operation, or stationary process, the surface of the contact hole seal has good sealing characteristics. Therefore, the new super-capacity sealed clean than traditional roll neck bearing roll neck bearing seal with a higher reliability.
In addition, sealed bearing Italian oil company recently developed a new generation of seals. The optimum design of the sealing structure can effectively prevent the intrusion of dirt. The sealing structure of a conventional radial sealing lip, between the outer ring and the seat there is a garter spring and a fixed ring. The new structure of the seal between the bushing and a push plate, ring and the outer surface of the rubber inner liner, inner lip pre-lubricated with a waterproof grease. According to the operating conditions and application requirements, a variety of flexible materials can be used. These materials include: nitrile, polyacrylic acid resin, fluorinated synthetic rubber.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7900A5DB NSK | 10 | 22 | 6 |
| 7340B NSK | 200 | 420 | 80 |