In the field of machine tools the considerable progress which has taken place in the last two decades, has been due to a large extent to the co-opera­ tion between teaching, research and industry. The paper describes how this co-operation, extending far beyond national boundaries, has influenced design fundamentals as well as design practice for metal cutting machine tools, and how this has contributed to the develop­ ment of machines which show better quantitative and qualitative perfor­ mance with higher technical and economic efficiency. Resume Le progres dans Ie domaine des machines outils, qu'on a observe depuis vingt ans est dft a la collaboration de l'enseignement, de la recherche et de l'industrie. Dans cette communication on montre que cette collaboration, qui s'etend a travers les frontieres nationales, a influence les principes de dessin et l'exe­ cution des machines outils. Elle a produit des machines de meilleure qualite et productivite avec un haut rendement economique et technique. Literatur [1] Nicolson, J. T.: Report on Experiments with Rapid Cutting Steel Tools, The Man­ chester Association of Engineers and the Manchester Municipal School of Technology, Manchester 1903. [2] Schlesinger, G.: Die Werkzeugmaschinen, Julius Springer, Berlin 1936. [3] Whitworth, J.: Address to the Institution of Mechanical Engineers, Glasgow 1956. Mommsen, Th.: Offener Brief an Professor Lujo Brentano, Miinchener Neueste Nach­ [4] richten, Nr. 530, 15. November 1901. [5] Ashby, Sir E.: Technology and the Academics, MacMillan, London 1959. Schlesinger, G.: Priifbuch fUr Werkzeugmaschinen, G. W. den Boer, Middelburg 1962.