... of use 2.unique self opening die head 3.cold rolling technology The process does not destroy the bottom diameter of ... be replaced for only 3-5 minutes.Product NameRebar Thread Rolling MachineModelDDG-40KDDG-40DDDG-40E/FDDG-50Gross Weight550KGElectric Motor Power4KWWork Voltage3 ... Standard12, 14, 16, 18, 20, 22, 25, 28, 32, 36, 40, 50Thread Pitch2.5P 3.0P 3.5PMax Screw LengthMax 65mmMax ...