An internal milling cutter for producing a recess terminating in a radius in a workpiece, in particular for milling a crankshaft, comprises a tool holder having interchangeable cutting inserts detachably attached thereto. For the production of the radius, a plurality of first interchangeable cutting inserts are provided, which are arranged one after another in the direction of cut and have cutting edges which produce complementary portions of the radius, wherein the first interchangeable cutting inserts for producing the radius are identically configured.

An indexable cutting tool of a lever-lock type applies a clamping force. At a bottom of an insert fixing portion, there is formed a pillar-shaped lever in a state in which one end protrudes from a placement surface of the insert fixing portion. A screw applies a pressing force to the lever between the one end and a portion such that the lever is pressed and inclined with the portion s a fulcrum in the middle of the lever so that the one end applies a clamping force to the cutting insert.