In recent years, more and more of a ball screw is used for a wide range of machines to meet the needs of high-precision and high-performance equipment, ball screw drive components to become one of the most widely used. In CNC machinery manufacturer in the world Shanghao ball screw, ball screw to increase positioning accuracy and extend its life. In the traditional mechanical, ball screw gradually replace Aikemusi rod. Usually with a ball screw preload to eliminate backlash when the machine is running an electric ball screw lift, but if Improperly installed ball screw can not demonstrate their accuracy and long life. This article focuses on the prevention of ball screw questions and problems, detailing some of the measurement program to help users find the unusual backlash causes. Ball screw causes and prevention of the occurrence of the problem: The following describes the main cause and how to prevent the problem occurred three ball screw. Ball screw nut ball screw nut installation method is only for axial load precision ground ball screw grade, radial force, moment will make contact with the surface of the ball screw nut additional stress load, which may cause wire bars of permanent damage. Correct installation is the effective maintenance of the premises. Thus, the ball screw nut is mounted to the machine vice, should note the following: 1) the screw axis must be parallel to the axis, the machine ends with the nut bearing seat with matching rails must be three in a line. 2) When installing nuts, as close to the support bearing. 3) When installing the support bearing, as close to the nut mounting portion. 4) When the ball screw is mounted to the machine, do not remove the nut from the screw to. Korea and Taiwan transmission machinery (Figure), where Taicang Ball Screw, Ball provided by the Dongguan City, Transmission Machinery Co., Ltd. of Korea and Taiwan. Dongguan City, South Korea Taiwan Transmission Machinery Co., Ltd. (www.dghantai.com) (www.hantai168.com) Baisha three villages located in Humen, Dongguan City Industrial Zone. Scraps and development in the wave of market economy, the current transmission machinery of Korea and Taiwan have a high visibility in the machine tool accessories, and enjoy a good reputation. Korea and Taiwan to achieve full network transmission machinery Commercial Union certification, marking our service and management level has reached a new height. Korea and Taiwan transmission machinery staff is willing to joint development with all people a better future.