Machine tool, particularly for milling a turbocharger compressor impeller

A method for machining a turbocharger compressor impeller having a first side, an opposing second side and a central bore that extends along a central bore axis from the first side to the second side, wherein the central bore axis is perpendicular to the first and the second sides, said method comprising the steps of:

• holding a tool by a tool holder,
• clamping the turbocharger compressor impeller only at its first side and its second side, by attaching it to an arbor, such that a section of the arbor projects into the central bore on the first side of the turbocharger compressor impeller in order to center it, by seating the turbocharger compressor impeller with its first side on a work rest surface that surrounds the arbor and by applying a contact pressure onto the second side of the turbocharger compressor impeller with a counter-holder, said contact pressure acting in the direction of the central bore axis,
• machining the turbocharger compressor impeller with the tool, and
• rotating the turbocharger compressor impeller about the central bore axis by a drive means.