Method for a cnc-lathe

A turning method for a CNC-lathe, comprising the steps of:

• providing a workpiece, rotatable in a rotation direction around a rotational axis thereof;
• providing a turning tool extending along a tool axis, wherein the turning tool includes a cutting element including a rake face, a clearance face and a cutting edge formed at a border between the rake face and the clearance face, wherein the cutting element is arrangeable in different orientations with respect to the workpiece, each orientation being defined by a nominal rake angle (γn) with respect to a surface of the workpiece, and wherein the cutting element has, at a point of contact between the cutting edge and the workpiece, an effective rake angle and an effective clearance angle that depend on wear of the cutting element;
• arranging the cutting element with respect to the workpiece at a first orientation defined by a first nominal rake angle resulting in a first effective rake angle and a first effective clearance angle;
• machining, in a first machining step, the workpiece with the cutting element in the first orientation;
• and, after the first machining step,
• re-arranging the cutting element with respect to the workpiece, or with respect to another workpiece to be machined, at a second orientation defined by a second nominal rake angle resulting in a second effective rake angle and a second effective clearance angle, wherein the second nominal rake angle is different from the first nominal rake angle;
• and
• machining, in a second machining step, the workpiece, or the another workpiece, with the cutting element in the second orientation.