Stud removing and transfer adaption mode

A system for pulling a stud electrode from its retaining base in a pot smelter for the smelting of aluminum. An upper end of the stud is engaged with a spigot attached to a puller and the stud is twisted with the puller to loosen it. There is a pair of opposed longitudinal channels on the exterior of the stud, open at the end of the stud. A pair of opposed further longitudinal channels on the exterior of the stud are closed at the end of the stud and generally parallel to the first longitudinal channel. A pair of opposed circumferential channels join the longitudinal channels. A socket is mounted on the spigot to engage the stud. The socket has a generally cylindrical, hollow body to fit over the stud. Teeth in the socket are positioned to engage the longitudinal channels and to pass along the circumferential channels. The stud may be turned to free it from the base and lifted with the teeth engaging the longitudinal channel.