4R OHS hydraulic bending machines are used in the bending process of medium and heavy platinum sheet metal, aluminum, or stainless materials, thanks to their welded strong steel body, hydraulic movement of the bottom and side rolls, and planetary gearbox that is connected to the main engine. 4R OHS roll bending machines, with their strong steel body and hydraulic movement through lower-lateralrolls, ore used forrolling sheet, aluminium or stainless materials and light or medium sheet via propulsion through planet redactor connected to the main motor.