Z47-12/4 Multi-Station Automatic cold header,cold heading machine,cold forging ... ,cold forging header Z47-12/4 Multi-Station Automatic cold header,cold heading machine,cold forging hedaer, ... of feeding with large disk.6. With thread rolling machine,it can carry out the one-line automated ... production from cutting,upsetting to thread rolling for bolts and screws.7. The third station ...