This paper deals with the design of a medium-sized high speed milling machine for end milling of thin-walled aluminum parts. Specifications for top parameters of spindle speed, feedrates, and accelerations are derived, and it is shown how the worldwide maximum values have been achieved. Design criteria of stiffness of the individual subsystems and high gain of control loops are discussed, and solutions are presented. Strategies for milling of thin ribs and thin webs arc explained, and examples of cutting conditions for two sample parts are given as machined on the three-axis configuration of the machine Alternative designs for extending the machine to five axes are described.

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