Main features: 1. All steel welded structure, stress relieved for high rigidity and stability 2. Torsion shaft force dsynchronization of mechanical limit stopper balance, with high precision 3. Integrate hydraulic transmission system, large range of speed regulation thanks to transmission ofthe sliding block, stable and reliable performance 4. Rear stopper and the slidingblock have electrical adjustment for the stroke, with manual fine turning, anddigital indication 5. Adjustment mechanism of slidingblock independent from oil cylinder assembly to enhance sealing effect of upperpunch retainer is fitted with tilting warp offset mechanism 6.  For bending machine from 250Tup synchronization mechanism of mechanical or electrical hydraulic transmissionif fitted, lower working table is fitted with warp offset mechanism 7.  Multi machine combinedoperation is possible