China, the world's largest machine tool consumer, manufacturing has become a pillar industry. Since the development of the automobile industry, the machine speed and efficiency are put forward higher requirements for new ones. It is understood that the ball screw, the current rate of CNC machine tools China has developed rapidly. Japanese CNC machine tools increased from 40% to 90% of the beginning of the level of Shunde HIWIN ball screw, it took about 15 years to supply HIWIN ball screw, from the perspective of the development of China's current speed, such as to reach the current Japan's level, estimated not need to spend so much time and improve the performance and quality of CNC machine functions of parts has become urgent development of China's machine tool industry. The main parameters of the thread 1) the outer diameter d (large diameter) (D) - with the external thread crests coincide with the diameter of an imaginary cylindrical surface - also known as nominal diameter 2) the inner diameter (diameter) d1 (D1) - and outer coincide with the end of the thread imaginary cylindrical surface diameter, as the risk of cross-section of the strength calculation to calculate the diameter of 3) in diameter d2-- imaginary cylindrical surface at a diameter equal to the width between the teeth and tooth thickness in the axial section, approximately equal The average diameter of the d2≈0.5 threaded (d + d1) 4) P-- two adjacent teeth pitch diameter cylindrical surface on the bus between two points corresponding to the axial distance 5) lead (S) - the same helix two teeth in the axial diameter cylindrical surface corresponding bus distance between two points on the adjacent HIWIN ball screw, ball screw, 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!