Length-adjustable steering shaft and method for producing a length-adjustable steering shaft

A length-adjustable steering shaft comprising:

• a hollow shaft that is comprised of metallic material and includes an opening;
• an inner shaft comprised of metallic material, the inner shaft being received rotatably-fixedly in the opening of the hollow shaft and in an axially movable manner;
• and
• a pull-out retention means that includes
• an outer stop that protrudes into the opening of the hollow shaft, with the outer stop being formed from the metallic material of the hollow shaft, and
• an inner stop that protrudes outward from the inner shaft, the inner stop being formed from the metallic material of the inner shaft, wherein the inner and outer stops comprise axial stop surfaces that are directed toward each other in an axial direction, wherein a layer of non-metallic material is applied at least partially in a region of the axial stop surface of at least one of the inner stop or the outer stop.

A method for producing a length-adjustable steering shaft, the method comprising:

• providing a metallic hollow shaft and an inner shaft;
• producing an inner stop with an axial stop surface on the inner shaft, the inner stop protruding radially outward from an outer circumference of the inner shaft;
• introducing the inner shaft in the axial direction into the opening of the hollow shaft;
• and
• producing the outer stop with the axial stop surface on the hollow shaft, the outer stop engaging radially inward in an open cross section of the opening of the hollow shaft, wherein the axial stop surfaces of the inner stop and the outer stop are directed toward each other in the axial direction,
• wherein before the inner shaft is introduced into the opening of the hollow shaft, a layer of non-metallic material is at least partially applied in a region of at least one of the inner stop or the outer stop.