The body of JH21 series press is welded with steel plate, so it is with good rigidity and stable precision. The crankshaft is placed lengthways, so the structure is compact and
the contour beautiful. Using the combined pneumatic friction clutch and brake, the engagement is smooth, the action agile, and the noise low. Gear pair adopts the flooding system lubrication. The slide block is six-face rectangle with longer guide track whose face is copper panel. Meanwhile an imported hydraulic overload protector is installed in the slide block whose air pump and high-pressure ring seal are imported. In case of overload, it will restore to its original position. It is marked with high sensitivity and reliability. For JH21-25/25B/45, the die set is adjusted manually. For JH21 -25/45, there is scale display to show the die set height. For JH21-25B, digital display is adopted to show the die set height (with precision reaching 0.1mm). For models above JH21-63, the die set is adjusted by means of motor.