Several Reasons Why The Lead Wire Cannot Be Fully Inserted Into The Cold Pressing Needle

If the core wire is not straight and fully inserted into the metal cavity of male crimp contact after the insulation layer of the conductor is stripped, some conductor strands will remain outside the terminal or deviate from the crimping area, which makes it impossible for the crimping point to form an ideal mechanical and electrical contact surface. Angle deviation of the core wire when entering the pin body can cause it to fail to reach the bottom of the pin. In this case, even if the cold pressing operation is completed, the conductor will not reach the predetermined contact depth.

Another common factor is that the stripped wire length does not match the crimp contact design. If the stripping length is too short, the end of the conductor may not extend to the crimping section; if the stripping length is too long, the insulation layer may enter the metal crimping area, interfering with the tight bond between the core wire and the pin body. It is recommended to use crimp contact pin with an inspection hole to visually confirm whether the metallic luster of the core wire is visible inside the pin body to determine if the conductor has reached the specified depth.