This International Standard specifies recommended procedures for tool-life testing with high-speed steel, cemented carbide and ceramic single-point turning tools used for turning steel and cast iron workpieces. It can be applied in laboratory testing as well as in production practice. In turning, cutting conditions may be considered under two categories: a) conditions as a result of which tool deterioration is due predominantly to wear; b) conditions under which tool deterioration is due mainly to other phenomena such as edge fracture or plastic deformation. This International Standard is solely concerned with recommendations for testing which results predominantly in tool wear. Testing for the second category of conditions above is to be subject to further study. This International Standard establishes specifications for the following factors of tool-life testing with single-point turning tools: workpiece, tools, cutting fluid, cutting conditions, equipment, assessment of tool deterioration and tool life, test procedures and the recording, evaluation and presentation of results. Further general information is given in annex A. NOTE 1 This International Standard does not constitute an acceptance test and should not be used as such.