The optimisation of drills for the machining of austenitic steel

The paper deals with the results of investigations on the design of a twist drill for the machining of austenitic steel. The subject matter of these i nvestigations was the geometry of the drill points, the shape and angle of inclination of the flutes (chip spaces), the quality of the material of the tools and the kind of coating of the drill points. The wear of the drill p oints as well as the roughness and erroneous shape of the bore-holes have b een measured. (C) 1999 Elsevier Science S.A. All rights reserved.