Pin Lancing is a process by which an electrical current is passed through a hollow carbon rod which has a special coating of thin metal. The rod is held in a handle similar to a welder's stinger. The welder strikes an arc by touching the carbon rod to the metal pin resulting in a very powerful arc which begins to burn a hole into the pin. Oxygen is directed through the center of the hollow carbon rod accellerating the burning process and turning the center of the pin to molten metal as the welder advances the carbon rod through the pin. When a hole has been burned completely through the pin the process is stopped and the pin is allowed to cool and shrink into the hollowed center. As the pin cools and shrinks inward it decreases its outside diameter making it slightly smaller than the bore and allowing it to be removed.
Pin Lancing is a fast, cost effective way to remove seized pins of all sizes which cannot be removed by hydraulic force or other means.