Patent ID: 7153071

Claim:
Device for chip forming machining comprising a first rotatable body and a second rotatable body arranged along a common axis of rotation; the first body defining a male element having a male thread integrally formed on the male element such that the male element and the male thread form a one-piece unitary male element, and the second body defining a female element having a female thread integrally formed on the female element such that the female element and the female thread form a one-piece unitary female element, into which the male element is inserted for the forming of a joint; the respective threads forming a threaded joint between the first and second bodies; the male element comprising at least one outer circumference surface displaced in the axial direction in relation to the thread thereof, and which by a press fit engages a corresponding inner circumference surface of the female element; at least one of the outer circumference surface of the male element and the inner circumference surface of the female element has an out-of-roundness, wherein the press fit occurs along two or more predetermined areas of press fit separated from each other in a circumferential direction.