Patent ID: 8850861

Claim:
Method of producing a circularly cylindrical body ( 10 ), which consists of a deformable material and which has at least one helical internal recess ( 12 ) extending in the interior of the body, wherein the body is initially produced with a rectilinear course of the internal recess and wherein the body, which is cut to a specific length, is subsequently subjected to a rolling process, while being supported over its entire length on a support ( 16 ), by means of a friction surface arrangement ( 23 ), which similarly engages over the entire length of the body, with a friction surface ( 24 ) arranged parallel to the support, wherein the rolling process is carried out in several steps, wherein in a first step a rolling movement is carried out with use of a first axis ( 25 ) of rotation of the friction surface arrangement and in a second step a rolling movement is carried out with use of a second axis ( 26 ) of rotation, which is different from the first axis of rotation, of the friction surface arrangement, wherein the axes of rotation extend perpendicularly to the support or to the friction surface.