Hydraulic press of this series are designed for stretch forming and pressing of small metallic articles, pressing of non-metallic materials and powder products, correction of shafts and press fitting of sleeves. They have separated hydraulic and electric systems controlled with centralized press buttons to realize the two processes of constant pressure and constant distance. Also pressure-retaining time-delay and auto-return can be made. The pressure and strokes of the press can be adjusted within the range specified.