Would be a possibility, although the term 'Gewindebock' seems to be a vernacular term rather than the technical term and I haven't found a definition in search engines.

Today the threads of threaded fasteners (such as machine screws, wood screws, wallboard screws, and sheetmetal screws) are not cut via single-point screw-cutting; instead they are generated by other, faster processes, such as thread forming and rolling and cutting with die heads. The latter process is the one employed in modern screw machines. These machines, although they are lathes specialized for making screws, are not screw-cutting lathes in the sense of employing single-point screw-cutting.
http://en.wikipedia.org/wiki/Screw-cutting_lathe

A die head is a threading die that is used in the high volume production of threaded components.
Die heads are commonly used on lathes, turret lathes, screw machines and CNC lathes. They may be used for either cutting a thread or rolling a thread. They may also be used for internal or external thread cutting.
In operation, there are usually four moveable chasers that cut the thread then back away from the work to permit rapid removal of the tool. The lower picture at the right shows four sets of chasers. Each set of chasers is designed to cut a different thread. One set of chasers would be used at a time, each chaser is inserted into the die head (in the correct order) and the die head is closed bringing the chasers down to their cutting position. When sufficient length of thread has been cut the die head will open allowing for rapid retraction of the head without interference with the newly formed thread.
http://en.wikipedia.org/wiki/Die_head

Thread cutting die head for power driven threading machines
Gewindeschneidkopf für motorgetriebene Gewindeschneidmaschinen
http://www.linguee.de/englisch-deutsch/uebersetzung/thread c...

Gewindeschneidkopf - Thread Cutting Head

http://www.wagner-werkzeug.de/index.php?id=10