In metal cutting machining, tool selection problem almost every process engineers must face.

Tool selection to consider many issues, and accordingly there are many principles such as the principle of efficiency, precision machining principle, stability principle, the principle of economy and so on.

First talk about the principle of efficiency.

In fact, the principle of efficiency and other principles inseparable, especially the principle of economy. The main purpose of the requirements of efficiency, is to ensure that the entire process of the economy. But efficiency is particularly important, so I put it independent, separately discuss the issue.

The first is the principle of efficiency in ensuring efficiency under acceptable precision and acceptable stability premise. Without this basic condition, the efficiency of the question. Just as we want our vehicles (such as cars) can give us more speed, but safety is often the first one. Once the crash, many people will seriously consider whether you really continue to choose airports, airlines will re-examine the existing security policies. Without security, the aircraft would not have become the preferred means of transport, the same is true tool of choice.