Method and apparatus for producing a connecting element

A method of forming a semi-finished connecting element, in particular a semi-finished drill or chisel with at least one rotary entrainment surface and at least one locking depression, the method comprising:

• providing a semi-finished connecting element,
• forming, using a single die and at least one moveable forming body, at least one rotary entrainment surface and at least one locking depression in the semi-finished connecting element wherein the at least one locking depression is formed by embossing performed by radially applying the at least one moveable forming body to the semi-finished connecting element and the at least one rotary entrainment surface is formed by forcing the semi-finished connecting element axially into a longitudinal opening of the single die wherein the longitudinal opening is shaped to form the at least one rotary entrainment surface.

An apparatus for producing a connecting element from a semi-finished connecting element, in particular an insertion end of a drill or chisel made of metal, secured in an axially movable manner in a chuck of a hammer drill, comprising:

• a die with a longitudinal die opening for forming at least one rotary entrainment surface in the semi-finished connecting element wherein the longitudinal die opening is shaped to form the at least one rotary entrainment surface, and
• at least one forming body, at least radially movable and arranged in the at least one recess of the die by which the at least one locking depression can be formed by embossing in the semi-finished connecting element.