Patent ID: 6840866
Filing Date: 2005-01-11
Classification: B23G,F16B,Y10T

Abstract:
1. A method for producing a nut that has a drive area and a clamping area which are produced as one piece, the nut having a bore that is fully engaged in the clamping area and the drive area with an at least partially cylindrical internal threaded section in the drive area, and an at least partially conical internal threaded section in the clamping area, comprising the steps of: producing the bore that is fully engaged in the clamping area and in the drive area as a cylindrical bore; screwing a screw tap into said cylindrical bore up to a predetermined position, said screw tap having in axial direction, viewed from a front side thereof, a centering cutting section and a subsequently joining first cutting section that are arranged next to each other for the production of the conical internal threaded section of the clamping area, and a subsequently joining second cutting section for the production of the cylindrical internal threaded section in the drive area, said second cutting section having teeth which extend in a longitudinal direction, said first cutting section having teeth that extend at a first angle laterally to the longitudinal direction, and the centering cutting section having teeth that extend at a second angle laterally to said longitudinal direction; mapping said teeth of the second cutting section in the drive area of the nut for the production of the cylindrical internal threaded section, and mapping the teeth of the first cutting section in the drive area, or in the clamping area, respectively, of the nut for the production of the conical internal threaded section of the clamping area; and subsequently turning back the screw tap from the bore of the nut.