Boring bar arrangement

A boring-bar arrangement comprising:

• a boring bar/boring bar head comprising an end region which is configured to support a cutting tool, a back end which faces away from the cutting tool, and a female thread;
• a securing device which is configured to secure the boring bar/boring bar head to a machine tool for a machining operation, the securing device comprising a cylindrical reduction sleeve which is configured to be secured in a tool chuck or in another tool holder, the cylindrical reduction sleeve comprising a front end that faces away from the tool chuck and a protruding hollow section which is configured to receive the boring bar/boring bar head, the protruding hollow section comprising,
• a hollow-section interior,
• a hollow-section outer wall,
• a hollow-section wall which is arranged between the hollow section interior and the hollow-section outer wall, the hollow-section wall being configured to stabilize the boring bar/boring bar head, the hollow-section wall having a first thickness in a side region where the cutting tool protrudes from the boring bar/boring bar head and a second thickness in a rest of the hollow-section wall of the protruding hollow section, the first thickness being less than the second thickness, and
• a longitudinal axis which runs axially parallel to and at a distance from an axis of the cylindrical reduction sleeve or the another tool holder and of the boring bar/boring bar head;
• wherein,
• the boring bar/boring bar head is releasably secured as a replaceable head, via the back end, at a front end of the protruding hollow section;
• and
• a clamping bolt which is configured to run coaxially through the cylindrical reduction sleeve or the another tool holder and the protruding hollow section over a respective total length thereof, the clamping bolt comprising a front end which comprises a male thread which is configured to sit in the female thread of the boring bar/boring bar head.