Tool for fine machining of bores

A machine tool for fine machining of bores, comprising:

• a tool holder configured to rotate relative to a workpiece to be machined and having a tool axis;
• a plurality of cutting inserts removably attached to the tool holder, the active cutting edges of the cutting inserts having a common cutting circle that is coaxial to the tool axis;
• and
• the tool holder having an insert seat shell configured for radially positioning the cutting inserts and being rotatable about the tool axis, wherein the insert seat shell has an irregular or regularly curved annular contour;
• wherein each cutting insert has two contact sites that abut the insert seat shell, the two contact sites being separated by an angular distance with respect to the tool axis.

A machine tool for fine machining of bores, comprising:

• a tool holder configured to rotate relative to a workpiece to be machined and having a tool axis;
• a plurality of cutting inserts removably attached to the tool holder, the active cutting edges of the cutting inserts having a common cutting circle that is coaxial to the tool axis;
• and
• the tool holder having an insert seat shell configured for radially positioning the cutting inserts and being rotatable about the tool axis;
• wherein each cutting insert has two contact sites that abut the insert seat shell, the two contact sites being separated by an angular distance with respect to the tool axis;
• wherein each cutting insert is additionally supported outside the insert seat shell on at least one respective shoulder which is anchored or formed on the tool holder for transmitting torques.