Modular technology in the milling cutter application started earlier, the turning, drilling, Reaming tool in various fields such as modular technology has made substantial progress. If Sandvik Coromant Capto provided by the Walter and lathe tool, Kennametal KM Tool provided, in the industrial application of the developed countries has already begun universal. Now, with regard to foreign tool to tool to promote the concept of modular modern tool for the automobile manufacturing industry, small quantities of more modern vehicle manufacturers provide a choice of the economy. Because the automotive industry is different from ordinary machinery and processing industries, many processes must use specialized tool manufacturing. If the engine crankshaft, whether it is within the crankshaft milling, trucks pull high-speed or crank, milling, cutting tools are used by the dedicated. These cutter knife manufacturers complex, more expensive prices. However, if the change of automotive products must involve CRANKTHROW or buccal plane size, may lead to the use of the new body to carry out the knife crankshaft processing, it will affect the automobile plant's product development cycle and manufacturing costs, and ultimate impact automobile factory's ability to compete. Therefore, the tool vendors should be focused on the development of flexible manufacturing crankshaft special tools, and automobile factories together to do everything possible to shorten the development cycle and reduce manufacturing costs.