In the metal industry, materials in the manufacturing cycle belonging to two different types: the ores and metal scrap. The operations that lead to the production of a metal are the main object of this field, both in the art that the primary extraction. The minerals are exploited industrially mainly oxides, sulfides and silicates. For this it is necessary to have a rubber coating resistant and able to withstand very high stresses.

The mechanical engineering is in all industrial countries and is a particularly important role in terms of quantity, in terms of employment, value added and international trade, both for the strategic role it performs. Overall, the production is made up of mechanical production of the assembly line, for this it is essential to take care of the lining of their rollers.