Tool wear is undesirable, yet unavoidable in any machining process, i.e., milling, turning, etc.

1. Which material properties should be considered in selecting an ideal cutting tool material? Briefly explain why these properties are important.
2. Taylors equation was developed in the 1920s to help predict tool life. Explain the limitations of the equation and why it is difficult to apply Taylors equation to a new cutting tool that your company wants to try out.
3. Of the four main tool wear mechanisms, which one is of most relevance in the case of machining steel using diamond cutting tools. Briefly explain your answer (one sentence).