- Metal spinning is a process by which metal is formed or stretched into an object like a chalice, cup or lamp stand. The process begins with a simple sheet of metal, usually in a disc or square shape. The sheet of metal is fixed to a lathe or spinning machine so it is oriented vertically. The machine spins the metal sheet around very fast so it rotates in the same way that a fan blade does. The operator then uses a strong metal rod to shape the metal while it spins.
- A simple sheet of metal can be transformed into something just by bending and stretching the metal. As the operator pushes the metal rod against one side of the spinning metal, it pushes and forms the metal into a symmetrical object. By pulling the rod back into the metal sheet very hard, the sheet can be formed into a narrow cylinder. By applying light pressure, the sheet forms into a wider cylinder. The metal can also be worked back into the object to double the thickness of the outer walls.
- The force of the shaping tool and the motion of the spinning metal are what cause the sheet to be formed into something new. There is a great deal of heat generated from friction, which softens the metal and allows it to be formed this way. In addition, the metals used are very soft. Usually pewter, tin or soft brass are used for metal spinning. In addition, objects that include a double flare like a chalice with a stand or a vase a with stand are made in two parts. The chalice bow and vase are spun from different metal sheets and soldered together, for instance.
