The present invention has an upper front and upper rear pinch roll and a lower pinch roll installed in front of the finishing mill, and by spraying the high pressure water to the surface of the strip entering the finishing mill to remove the scale formed on the upper and lower surfaces of the strip An apparatus for an upper rear pinch roll comprising a hollow roll and comprising power transmission means for transmitting power to the upper rear pinch roll, the power transmission means comprising a universal joint, an accelerator and at least two It is characterized in that it consists of a large reducer, a first pulse generator connected to each of the reducer, and a second pulse generator, to prevent the occurrence of scale by preventing high pressure water outflow and strip temperature drop to improve surface quality and productivity.
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