Milling machining of gears might be carried out also by hobbing machines in both cutting modes, in case the machine offers the chance of positioning milling tool in tangential direction.

In case stroke lenght along this axe be too short ( then not so good for machining large wheels with large curvature radius ) a good help might come by allowing to inclinate tool axe in transverse plane, for example as normal pressure angle, so that milling path always happens close to machine center-line (fig.16A) (fig.17A) (fig.21A) .

In this case tool moves along X-Z axes instead of along Z axe or X axe alone.