Three rollers are made from cold hard alloy through centrifugal casting. The thickness of cold hard alloy layer will be 15~25 mm.
the surface hardness will be HS68~75mm. Three roller are manufactured through special central protruding grinder to grinding. It makes that the effective working surface appears central protruding slightly. Therefore during the period of grinding, because of the rigid of roller, and expand with heat and contract with cold; it features automatic compensation, long life, high efficiency and fine size. For ordinary substance, it can be passed through one time, two times or several times till the needed size (in general the size will be about 0.02 mm measured with size plate) in accordance with its original size and toughness.
the surface hardness will be HS68~75mm. Three roller are manufactured through special central protruding grinder to grinding. It makes that the effective working surface appears central protruding slightly. Therefore during the period of grinding, because of the rigid of roller, and expand with heat and contract with cold; it features automatic compensation, long life, high efficiency and fine size. For ordinary substance, it can be passed through one time, two times or several times till the needed size (in general the size will be about 0.02 mm measured with size plate) in accordance with its original size and toughness.
