With the development of China's manufacturing, processing centres are also increasing the demand, especially 4-axis, 5-axis processing centre. CNC machine tools as the main feature, the NC table in the whole machine tool industry in the increasingly important role. The emergence of NC table for the processing center and milling machine to provide a rotating coordinates, axis through the fourth, fifth axis drive turntable or sub-head to complete the sub-point precision, ranging from the Rotary consecutive points, or processing, complex surface processing, machine tools to expand the scope of the processing. NC boring and milling machine design of the turntable, as the machine in modern enterprises wide range of applications, so its design is very necessary to enhance the production efficiency of machine tools. The turntable can also achieve precise automatic, to facilitate the processing box. The design is in the market know that some of the existing table of the technical parameters of the circumstances, his internal structure, institutions and power transmission organizations to design, paper, China now also on the NC table of the status and future Development were discussed.
Keyword：NC rotary table；Milling machine
