Facing head with rotary slide

A facing head comprising:

• a housing having a center axis;
• a rotary slide in the housing, the rotary slide having a rotation axis, the rotation axis being radially offset from the center axis of the housing;
• at least one cutter plate mounted on the slide for rotation about the rotation axis;
• a centrifugal drive in the facing head connected with the rotary slide for rotating the rotary slide about its axis of rotation between first and second positions, and the centrifugal drive being operable by rotation of the facing head;
• the centrifugal drive including:
• a base body;
• at least two driving bodies mounted in the base body of the facing head and displaceable essentially perpendicular to the center axis of the facing head to rotate the rotary slide to the second position upon application of centrifugal force;
• a return device for displacing the driving bodies radially inwardly to rotate the rotary slide to the first position when there is insufficient centrifugal force due to rotation of the facing head for displacing the driving bodies outwardly;
• a coupling device connected between the return device and the driving bodies causing the driving bodies to displace in opposition to each other upon application of centrifugal force thereto and under the action of the return device and
• a drive shaft in the housing extending along the rotation axis of the rotary slide and connected with the rotary slide for driving the rotary slide to rotate.