Tool for machining a work piece and method for machining a work piece

Machine tool for machining a work piece, having

• a main spindle unit (4) having a main spindle axis (C),
• a machining spindle unit (5) with a machining spindle axis A arranged next to a spindle axis of the main spindle unit (4) in a direction crosswise to the spindle axis of the main spindle unit to accommodate a machining tool (30), with the machining spindle unit (5) being displaceable by means of a first guide (10) along a first guiding direction and being crosswise displaceable along a second guiding direction by means of a second guide (12) and being capable of swivelling around a swivel axis (B) extending perpendicular to the spindle axis (A) of the machining spindle unit (5),
• at least one machining means that is arranged next to the spindle axis of the main spindle unit and opposite to the machining spindle unit (5), with the machining means being displaceable by means of a fifth guide (18) and/or by means of a fourth guide (20), said fifth guide extending perpendicular to said fourth guide, and said fourth guide extending parallel to the first guiding direction,
• with the machining spindle unit (5) and/or the machining means being capable of advancing to a work piece clamped in the main spindle unit (4), and
• with the machining tool (30) having a generating tool adapted to execute a generating teeth forming process, said generating tool comprising a single or multi-pitched, threaded tool, whereby said machining spindle (5) is advanced to a clamped work piece by means of a third guide (14) perpendicular to the second guide (12), parallel to the spindle axis (A) of the machining spindle unit (5), wherein the third guide (14) is swiveled together with the machining spindle unit (5).