4-Roll Hydraulic Cylinder Sheet Metal Bending Machine Technical Specifications ST-52 Steel construction body Highly equipped shafts made of SAE 1050 (CK-45) Certified steel Rollers driven by hydraulic motor and planetary gearbox Lower and side rolls with hydraulic up-down movement system Hydraulic balancing system Protected against overload Compliant with CE standards The device shown is a 4-Roll (Cylinder) Hydraulic Cylinder Bending Machine used in the heavy industry and metal manufacturing sector. It has more advanced technology than the previous 3-roll model and is specifically designed for mass production requiring high precision. Product Features and Operation 4-Roll System: The machine has two main (drive) rolls in the center and two bending rolls on the sides. This structure ensures that the metal sheet is clamped much more securely within the machine. Pre-bending Capability: The biggest advantage of 4-roll machines is their ability to perform perfect pre-bending by leaving very short straight edges on both ends of the sheet (without needing to flip the sheet). NC/CNC Control Panel: The advanced digital panel shown allows for the recording of bending operations and the production of multiple identical parts with the same precision. Hydraulic Drop-End: A hydraulic opening door (drop-end) system is available on the side for easy removal of the materialized cylinder from the machine. Technical Superiorities Precision: The material does not slip as it is continuously clamped between the two central rolls. Efficiency: Offers fast and safe operation with a single operator. Conical Bending: Conical forms can be easily created by moving the side rolls at an angle. Areas of Use Production of wind turbine towers. Large diameter pipelines and fuel tanks. Pressure vessels and silos. Curved body parts in the defense and aerospace industries.