... depth >0.6 mm, nitriding hardness acuity >=7001.2 Screw barrelScrew tube diameter, 50mmScrew tube material, 38CrMoALAProcessing, ... and sizing specification, 45, 55, 65mm diameter3 and cooling waterCooling water tank length, 1500mmCooling medium, water4, tractionDrawing method ... , drilling equipmentPunch, online servo servo motor punch (2),PLC control, punch line control automatic punching device6 and ...