In AHK 3-Roll Plate Rolling Machines, every 3 rolls are independently-driven with the reducers and hydraulic motors in the models with a roll diameter of 230mm and over, and in the models with a roll diameter of less than 230mm, the side rolls are driven by a hydraulic motor, reducer + gear and the upper roll is driven by means of chain gear. Akyapak AHK 3-roll plate rolls allow pre-bending on both sides of the machine without removing the plate.