Method and tool for creating a through-thread

A method for creating a through-thread, in particular a through-threaded hole, with a predefined thread pitch and with a predefined thread profile with at least one countersink in a workpiece by means of a tool, wherein:

• a) the tool can be rotated about a tool axis (A) extending through the tool and moved axially in relation to the tool axis, in particular by means of a turning device,
• b) the tool has, sequentially in the direction of the end face thereof,
• b1) a shank region, in particular for coupling to the turning device,
• b2) at least one neck region, in particular with one or two flute and/or helical flute regions, for transporting away chips,
• b3) a thread creation region with a thread creation means for creating the through-thread, and
• b4) an end region having the end face,
• c) to create the through-thread, the thread creation means is moved in a screw-in movement in an axial forward direction (VR) through the workpiece from a first workpiece side to a second workpiece side opposite the first workpiece side such that the end face projects out of the workpiece, wherein the thread creation means is moved through the workpiece, in particular along a first line, which is a helical line,
• d) then, to create at least one countersink, the thread creation means is moved in a countersinking movement, in particular along a second line that differs from the first line, and
• e) for subsequent withdrawal, the thread creation means is moved back through the workpiece in a screw-out movement in an axial backward direction (RR), in particular at least substantially along the first line.