MG-831E Multi-cylinder Hydraulic Punching Machine CE certification and SGS test Main Features: ... , high efficiency, low noise, no pollution and high precision, with fast, easy, safe and reliable mold changing. It is a leading ... ,340x420mm4. Max. punching travel: 50mm5. Diameter of oil cylinder: 100mm6. Piston travel of oil cylinder: 50mm7. Max. confined height: 225mm8. Oil tank ...