4 Hi Reversible Cold Rolling Mill

Working Diameter of the Roll Decreases as the Rolling Thickness of Metal Goes Down. 4 Hi Mill Consist of Pair of Back Up Rolls and a Pair of Work Rolls. 4 Hi Cold Rolling Used for Precise in Built Tolerance Contorl Due to 4 Number Rolls. Back Up Rolls are Keeping Constant Compression Load On Work Rolls Thus Avoiding Parting of Work Roll Due to Strip Insertion and Hence Maintain Thickness in Tolerance. 4 Hi Mills are Normally Used for Rolling Thickness Below 2.5 Mm and Down to 0.05 Mm Can Not Be Used for Below 0.05 Mm Thickness with Required Tolerance.