Abstract: A method for producing a tubular body with reduced internal stress uses 3D printing. The tubular body has an outer wall with a stiffening structure extending along at least part of the outer wall. The method sets a printing plane for 3D printing with a 3D printer, and prints a tubular body layer in the printing plane with the 3D printer. The tubular body layer has an outer wall layer and a stiffening structure layer extending in the printing plane along a periphery of the outer wall layer. The stiffening structure layer has at least two portions spaced apart from one another. The method produces an outer wall with a stiffening structure for a tubular body with reduced internal stress.

Abstract: A method for manufacturing a bearing includes the following steps: a) providing of an outer part with a concave running surface which forms a receiving area for receiving an inner part, b), providing an inner part that is arranged inside the outer part, which inner part is shaped annularly, c) arranging the inner part within the outer part in a machining position in which at least a part of an outer surface of the inner part is exposed for machining, and d), generating of a convex running surface of the inner part, which running surface engages with the receiving area of the outer part whereby the inner part is held captively in the outer part. Subsequently, the inner part may be tilted from the machining position into a running position in which the inner part is concentric with the outer part.

Abstract: Disclosed here is a method for producing a tubular body with reduced internal stress by using 3D printing. The tubular body has an outer wall with a stiffening structure extending along at least part of the outer wall. The method sets a printing plane for 3D printing with a 3D printer, and prints a tubular body layer in the printing plane with the 3D printer. The tubular body layer has an outer wall layer and a stiffening structure layer extending in the printing plane along a periphery of the outer wall layer. The stiffening structure layer has at least two portions spaced apart from one another. The method produces an outer wall with a stiffening structure for a tubular body with reduced internal stress.

Abstract: A method for manufacturing a bearing includes the following steps: a) providing of an outer part with a concave running surface which forms a receiving area for receiving an inner part, b), providing an inner part that is arranged inside the outer part, which inner part is shaped annularly, c) arranging the inner part within the outer part in a machining position in which at least a part of an outer surface of the inner part is exposed for machining, and d), generating of a convex running surface of the inner part, which running surface engages with the receiving area of the outer part whereby the inner part is held captively in the outer part. Subsequently, the inner part may be tilted from the machining position into a running position in which the inner part is concentric with the outer part.

Abstract: A line system for an aircraft comprises at least one double-walled fluid line with an outer line body, an inner line body arranged therein and at least one spacer. The outer line body and the inner line body are fluid-tight, wherein the inner line body is realized in one piece of a flexible material. The at least one spacer is arranged on at least one of the inner line body and the outer line body in order to space apart and/or electrically insulate the inner line body and the outer line body.