In the manufacturing industries, despite the development and improvement of metal forming processes, a great deal of reliance is still placed on metal cutting processes and this will continue into the foreseeable future. Thus, there will continue to be a requirement for the development of improved cutting tool materials, workpiece materials, cutting fluids and testing methods; collectively this activity can be described as improving machinability. Machinability is a parameter which in many ways is vague, sometimes qualitative and very often misunderstood. The purpose of this text is to give a...