Tube hairpin bender bending die: This bending die is made of die steel DC53, with a hardness of up to 60°-62°. The bending groove is processed with high precision and mirror polished. It is suitable for long-U tube bending machines of different manufacturers such as OMS, JDM, OAK, etc. It is an important die for bending long-U copper tubes of air conditioner evaporators and condensers. The copper and aluminum tubes bent with this die are full and bright without wrinkles or scratches. The outer diameters of copper and aluminum tubes that can be bent are: Φ4.76 Φ5 Φ6.35 Φ7 Φ7.94 Φ8.9 Φ9 Φ9.52 Φ12.7 Φ12 Φ14.5 Φ15.88, etc. Any specifications can be customized.