Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23B—TURNING; BORING
B23B7/00—Automatic or semi-automatic turning-machines with a single working-spindle, e.g. controlled by cams; Equipment therefor; Features common to automatic and semi-automatic turning-machines with one or more working-spindles
B23B7/02—Automatic or semi-automatic machines for turning of stock
Vorrichtung an Spiralbohrerfraesmaschinen, welche das Werkzeug schnell an das Werkstueck heranfuehrt, ihm waehrend der Bearbeitung des letzteren eine langsame Vorschubbewegung erteilt und es schnell zurueckfuehrt