Automatic Line turret is an important component of the main line used for the transport of heavy objects in turn to change Transmission and distribution of the workpiece to the workpiece from one position to another position in order to transform processes, changes in processing the workpiece surface, so that the whole process to the normal operation of production Turret design than other ordinary rotary table, it is a high load-bearing capacity of the table; and multi-turret, turret, compared with the general, he is not limited to the use of online work in the transport, but also aids for parts fabrication, assembly, welding and so on! The rotating turret smooth process, since the rapid braking, turntable flexible, reliable positioning, use of electric and hydraulic control Many different types of workstations, including CNC turret, hydraulic turret control, such as indexing The workbench is designed to sub-degree Only the completion of sub-degree indexing table movement, not circular feed, it is electro-hydraulic pulse motor in accordance with the instructions, when necessary degree of control at the point of view of gear drive to a certain table, together with the workpiece rotation Sub-degree rotary table can only be provided for the general point of view, the design for the sophisticated end table set foot mouse: use of a pair of precision of the Institute after the end of the gear teeth 360 degree positioning plate, the smallest sub-degrees angle of 1 °, sub - degree of accuracy up to ± 01 〃 It is mainly by the driving force, gear drive, worm drive, hydraulic drive, workstations and other components, and for worm elimination and to step up gap, is a very useful auxiliary machinery processing, assembly Introduced the subject of the main principles of its structure and mechanical design, the use of AUTOCAD and some do more than plan, and finally CNC rotary table is that the recommendations put Keywords: worm gear drive rotary table drive space to step up the elimination of the worm