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Wheel making
 
The spinning process
In spinning, sheet metal disc blanks or, for example, deep-drawn pre-forms are formed into rotationally symmetrical hollow shapes. The blank or pre-form is clamped between a spinning former and the tailstock pad and, by friction, rotated by the main drive. The spinning roller makes local contact with the outer face of the workpiece and forms the blank step by step under CNC control until the inside of the
workpiece is in contact with the former. The wall thickness remains more or less constant and the metal is generally formed cold. Machines can be specially adapted for hot working on request.
The principles of spinning