Method for creating an inner thread as well as a combination of a thread cutter and a body having a cutout

Abstract

A method for creating an inner thread in an opening of a body, using a thread cutter, including the following steps: a) the thread cutter having an axial lengthwise cutout adjacent to which there are blades that project radially outwards and that have cutting edges, is inserted into the opening, whereby several cutting edges arranged one after the other in the longitudinal direction are provided on the lengthwise cutout, which are offset with respect to each other in the circumferential direction, and which are pushed into the groove when the thread cutter is being inserted, b) the cutting tool is rotated by a maximum of 360° in order to create the entire inner thread in at least one projection next to the groove, whereby the cutting edges penetrate into the projection one after the other as the thread cutter turns, and c) the thread cutter is moved axially out of the opening.

What is claimed is: 
     
         1 . A combination of a body and a thread cutter, the combination comprising:
 a thread cutter; and   a body having a cylindrical opening having a groove running in a longitudinal direction and a depth, as measured from a center axis, equal to or greater than an outer radius of the thread cutter, a projection next to the groove in the circumferential direction running radially and axially;   the thread cutter having an axial lengthwise cutout and blades adjacent to the cutout, the blades having cutting edges projecting radially outwards and arranged one after the other in the longitudinal direction, a distance of the blades corresponding to the distance of the desired thread height, the blades being arranged so as to be offset with respect to each other in the circumferential direction.   
     
     
         2 . The combination as recited in  claim 1  wherein a number of cutting edges matches a number of threads created. 
     
     
         3 . The combination as recited in  claim 2  wherein, in the circumferential direction, play exists between the projection and an adjacent lengthwise cutout, the play amounting at a maximum to twice the axial height of the blades on the thread cutter.