[AS9100 certified precision gear manufacturer.] Yieh Chen Machinery Co., Ltd is the affiliate of Six Star Group. Six Star was founded in 1975 by Six brothers and devoted to the manufacturing of precision gear products. Throughout these years, Six Star has become one of the Top Five gear manufacturers in Taiwan. With a focus on precision gears and gearboxes, Six Star offers a broad range of industries, including machine tools, aerospace, agriculture machinery, robotic arms, transmission, hydraulic pumps and industrial machines. Six Star already received AS 9100 certification for stricter aerospace quality standards, and is also a member of the American Gear Manufacturers Association (AGMA). By paying close attention to every aspect of the gears and gearboxes produced - including profile, lead, pitch, run out, and efficiency - and using measuring facilities, Six Star can ensure that the gears we produce will meet or exceed international standards. Yieh Chen is never slackening off on pursuing being the best in the global market. Hence, we wish to achieve higher customer satisfaction and build closer relationship with customers by advancing our quality level.