JH21series open back press with dry clutch and hydraulic overload protector Welded body with steel plate and high intensity. Main motor is made by Siemens. Adopts combined pneumatic friction clutch and brake. Cluster gear adopts the flooding oil lubrication. Six-face rectangle lengthen guide; JH21-315B/400B adopts eight-face lengthen guideway. Equipped with hydraulic overload protecting device. JH21-25/25B/45 adopts manual shut height adjustment,among these types JH21-25/45 adopts scale display and JH21-25B with digital display.JH21-63 and above type adopts electric shut height adjustment with digital display. H21-45 can equip with die set height adjustment motor, the value will be displayed by digital. JH21-25B, JH21-45 and above type equipped with balance cylinder. Duplex valves imported. Electric compelling grease lubrication system. Balancing cylinder adopts manual lubrication system. One set of blowing device. Controlled by PLC with international brand. Buttons, indicators, AC con