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Metallurgy is the basis of modern industry, but also is a measure scale of modern industrial development. It is has been widely use in all important industrial sectors : transportation, mechanical engineering, steel engineering, power engineering and environmental technology. Metallurgical equipment is variety, not only the raw material factories require equipments, it also includes equipments from upstream to downstream process steps required for the metallurgy process, the rolling process, the formation process and the like. On these devices, equipped all kinds of bearings. These bearings are used under the metallurgical equipment unique "iron", "water", "hot" conditions, but also to meet the "heavy shock and vibration loads ", "from low speed to high speed acceleration or deceleration," such as the use conditions for use in very harsh conditions of their holdings.
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