As a further extension of the development drive sliding screw and ball screw due to its high efficiency, low temperature, high-precision, high speed, high rigidity, reversible, long life, low power consumption, synchronization, high sensitivity, without gaps, maintenance and simple and has been widely used in modern CNC machine tool feed servo mechanism, in order to meet the high feed rate of CNC machine tools, high precision, high stability and rapid response requirements, must be selected ball screw, and make the necessary The check calculations. Ball choices include the contents of its precision selection, sizes (including lead and public Cheng diameter), and several other aspects of supporting way. Ball screw with a dynamic load carrying capacity or rated static load model to represent the ball screw in the center of the design process is generally determined by dynamic load rating of ball screw sizes, but subjected to compression of the elongated Ball bar for stability calculation load; for high speed long ball screw, ball screw support distance big check for critical speed; for high precision ball screw for rigidity checking; CNC machine tools Ball, to be accounted for its moment of inertia; Ball grease the whole closed-loop system, the need to account for its resonant frequency. To use such as the need to remove the auxiliary units, otherwise the ball is likely to fall off when loading and unloading. Nuts handling should note the following: (1) should be less than the outer diameter of the auxiliary set screw bottom diameter of 0.1-0.2mm. (2) Auxiliary sets in use must try to be screw threaded shaft shoulder. (3) When the uninstall, not excessive force, so as not to damage the nut. (4) into the mounting holes to avoid the collision and eccentric. Ball Ball error _ _ Korea and Taiwan transmission machinery provided by the Dongguan City, Transmission Machinery Co., Korea and Taiwan. Dongguan City, South Korea Taiwan Transmission Machinery Co., Ltd. (www.dghantai.com) strong, credible, in Dongguan, Guangdong and other machine tool accessories industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Korea Taiwan transmission machinery and you hand into the brilliant, for a better future!