Traditional processing methods typically employ a large tool for processing at a lower speed, but in general, the larger the design of the tool itself is not suitable to complete more complex processing. For micro-processing tools, conventional machine must operate at low speed, and miniature tools brittle and easy to break. Due to large tool has a large mass, so the force on the chip has a certain resilient effect; conversely, the smaller the tool due to greater brittleness easier breakage. Chip is one of the main tools of adverse damaged. In fact, due to poor micro-chip and damage the tool cutting parameters than using unreasonable damaged miniature tool more. In order to minimize the possibility of damage to the tool, you must make the chips rapidly excreted from the cutting area. Mini tool in the processing require high spindle speed, and in order to achieve the desired spindle speed fast chip even higher. Define the size and the processing speed of the tool: The tool includes a mini-diameter 0.250 "(6.35mm) following such a small diameter cutters and drill tool for complex, precision machining is essential, and the use of high-speed spindle for optimum processing results. There is no exact definition of high-speed cutting and absolute parameters, but a usable reference defined spindle speed 25000r / min or more can be called high-speed cutting. improve the efficiency of micro-tooling of three related elements include optimal design of micro tools, the use of low viscosity coolant and high-speed cutting technology.