Whirling cutting device

A device for chip-producing machining of work pieces in the form of pipes and rods, using the whirling method, comprising:

• a whirling unit having a housing;
• an accommodation for a whirling tool with teeth on the inside, said accommodation being rotatably mounted on the whirling unit;
• and
• an electromagnetic rotational direct drive, comprising:
• a ring-shaped stator attached to the housing and having an essentially C-shaped cross-section with free shanks and a circumferential gap, and
• a rotor configured in the form of a ring-shaped hollow shaft having a T-shaped cross-section and provided with permanent magnets, said rotor being connected with the accommodation and mounted on an outside of the C-shaped cross-section of the stator on the free shanks, on both sides of the circumferential gap;
• wherein the stator is provided with a winding for generation of an electromagnetic field, said winding being disposed between the free shanks and a closed rear wall of the C-shaped cross-section of the stator, the wall lying opposite the shanks.