Method and device for the precision machining of crankshafts and camshafts

A device for the precision machining of crankshafts or camshafts, comprising:

• a segmental holder;
• and
• a plurality of adjustable cutting inserts arranged on a periphery of the segmental holder, each cutting insert comprising a supporting body made of a first material and an inlet made of a second material having a greater hardness than the first material, the inlet having two cutting edge sections with a roof-shaped profile in which the two cutting edge sections form an enclosed angle with one another in a range between 173° to 178°, each cutting edge section having an edge radius that causes the two cutting edge sections to be inclined at an angle in a range between 2 to 3° relative to a plane perpendicular to a locating surface,
• wherein the plurality of cutting inserts are mounted laterally, radially and tangentially in an alternating manner on the periphery of the segmental holder.