... height 200 -1500mm correcting speed 4500mm /min Power of main driving motor 7.5kw Material of H-steel Q235 II. ... seat, machine body, left column, right column, pressing wheel, main driving system, pressing leading screw, decelerator, needle device and electrical control ... threaded leading screw , the material of pressing roller and driving roller is adopted with 40Cr. Surface quenching treatment is ...