# Yieh Chen Machinery Co., Ltd. - Yieh Chen Machinery | Thread Rolling Machine & Precision Gear Manufacturer | AS9100 & ISO9001 Certified > Your total solution for thread rolling machines, spline rolling, chipless forming, and precision gear manufacturing.. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. ## Homepage - [Yieh Chen Machinery Co., Ltd. - Yieh Chen Machinery | Thread Rolling Machine & Precision Gear Manufacturer | AS9100 & ISO9001 Certified](https://www.yiehchen.com): Your total solution for thread rolling machines, spline rolling, chipless forming, and precision gear manufacturing.. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. ## Company - [Company Profile | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/company-profile.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Equipment | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/equipment.html): To ensure that each step of the process meets Six Star's strict quality requirements, only machines from reputable, well-established companies are used. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Quality | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/quality.html): Use of the cutting edge machines in conjunction with Six Star's manufacturing process allows the production of gears that meet DIN-2, JIS 0 and AGMA 15 qualification standards. Six Star has received ISO9002 certification, and 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. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Gear Technology | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/technology.html): Six Star knows that many customers are searching for gears that are unique to their product or machine. They need a manufacturing partner that can provide custom design services and overcome technical difficulties to create gears for any application. Six Star's gear engineers work with customers to discuss speed requirements, torque, horsepower, load, mechanical ratings and other specifications with the added benefits of shortening development time, achieving more practical designs, and lowering overall costs. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Video | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/video.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Privacy Policy | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/Privacy_Policy_Statement.html): Yieh Chen Machinery Co., Ltd. respects the privacy rights and interests of each customer. Yieh Chen Machinery Co., Ltd. will observe the principles when processing your personal information fairly and lawfully. We take the protection of personal data very seriously. We want you to know when we are storing your data, what data we are storing and how we are using it. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. ## Products - [Yieh Chen thread rolling machine manufacturer: spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan | Yieh Chen Machinery Co., Ltd.](https://www.yiehchen.com/en/category/index.html): Yieh Chen Machinery Co., Ltd., part of Six Star Group, offers a vast range of meticulously engineered gear and transmission components certified under ISO9001 & AS9100. With expertise in producing spur gears, helical gears, worm shafts, and more, Yieh Chen serves critical industries including aerospace and agriculture. Their state-of-the-art production facilities are designed to meet international standards such as DIN and AGMA, ensuring top-tier quality and reliability. - [Gear Components | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/A_Gear.html): Gears For Aerospaces, Agriculture, Robotic Arms, Transmission, Industrial Machines manufacturer. Six Star Grop is founded in 1975 by six brothers, having 40 years of experience on manufacturing gear products. By focusing on precision gears, Six Star offers gears for a broad range of industries, including machine tools, aerospace, agriculture machinery, robotic arm, Engine transmission, hydraulic pumps and industrial machines. Six Star ensures details of each manufacturing processes are all well planned and executed. Moreover, we use machine tools from Switzerland, Germany, USA, and Japan to make gears comply with DIN, AGMA, JIS, and GB quality standards. Yieh Chen is a high-quality Gear Components, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Thread Rolling Machines | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B_Thread_Rolling_Machine.html): Hydraulic, Cam Driven And 3 Roll (For Tube) Thread Rolling Machine manufacturer. Yieh Chen Machinery offer customers rigid machines with function of precision, durability, simple operation and easy maintenance with competitive price. Morever, Yieh Chen also design fully automatic feeding system for thread rolling machine. The entire automated production lines are all included in our range of service in order to provide total solution for customers. Yieh Chen is a high-quality Thread Rolling Machines, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Other Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/C_Other_Machine.html): Spline Rolling Machine, Multi Forming Machine and Special Purpose Machine manufacturer. We offer customer rigid machine with function of precision, durable, simple operation, easy maintenance and competitive price. Moreover, we design fully automation production lines for wire forming machine, special purpose machine, entire automation production lines are all in our service areas in order to provide total solution for customers. Yieh Chen is a high-quality Other Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. ## Gear Components - [Gear Components | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/A_Gear.html): Gears For Aerospaces, Agriculture, Robotic Arms, Transmission, Industrial Machines manufacturer. Six Star Grop is founded in 1975 by six brothers, having 40 years of experience on manufacturing gear products. By focusing on precision gears, Six Star offers gears for a broad range of industries, including machine tools, aerospace, agriculture machinery, robotic arm, Engine transmission, hydraulic pumps and industrial machines. Six Star ensures details of each manufacturing processes are all well planned and executed. Moreover, we use machine tools from Switzerland, Germany, USA, and Japan to make gears comply with DIN, AGMA, JIS, and GB quality standards. Yieh Chen is a high-quality Gear Components, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Spur Gears | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/product/spur_gear.html): Spur Gears manufacturer. Yieh Chen is a high-quality Spur Gears, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Helical Gear / Cycloid Gear | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/product/helical_gear.html): Helical Gear manufacturer. Yieh Chen is a high-quality Helical Gear / Cycloid Gear, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Worm / Worm Shaft | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/product/worm-worm_shaft.html): Worm / Worm Shaft manufacturer. Yieh Chen is a high-quality Worm / Worm Shaft, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Bevel / Spiral Bevel Gear | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/product/bevel_spiral-bevel_gear.html): Bevel Gear manufacturer. Yieh Chen is a high-quality Bevel / Spiral Bevel Gear, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Precision Spur / Helical Gear Rack | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/product/precision_spur-helical_gear_rack.html): Precision Spur / Helical Rack and Gear manufacturer. Yieh Chen is a high-quality Precision Spur / Helical Gear Rack, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. ## Thread Rolling Machines - [Thread Rolling Machines | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B_Thread_Rolling_Machine.html): Hydraulic, Cam Driven And 3 Roll (For Tube) Thread Rolling Machine manufacturer. Yieh Chen Machinery offer customers rigid machines with function of precision, durability, simple operation and easy maintenance with competitive price. Morever, Yieh Chen also design fully automatic feeding system for thread rolling machine. The entire automated production lines are all included in our range of service in order to provide total solution for customers. Yieh Chen is a high-quality Thread Rolling Machines, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Heavy Duty Hydraulic Thread Rolling Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B01.html): YC-1200, YC-860P, YC-750P manufacturer. Max OD 100, 120mm (3.9", 4.7") Yieh Chen is a high-quality Heavy Duty Hydraulic Thread Rolling Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [High Speed Hydraulic Thread Rolling Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B02.html): YC-530PS(H) manufacturer. Max OD 80 (3-1/8") Yieh Chen is a high-quality High Speed Hydraulic Thread Rolling Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Hydraulic Thread Rolling Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B03.html): YC-530P, YC-530, YC-420, YC-310 manufacturer. Max OD 16, 35, 65, 80mm (5/8", 1.38", 2-1/2", 3-1/8") Yieh Chen is a high-quality Hydraulic Thread Rolling Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [3 Roll (For Tube) Thread Rolling Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B04.html): YC-60AP (YC-120A), YC-60A, YC-30A manufacturer. Max OD 30, 60, 120mm (1-1/8", 2-1/4" 4-3/4") Yieh Chen is a high-quality 3 Roll (For Tube) Thread Rolling Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Cam Driven Thread Rolling Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B05.html): YC-30, YC-20, YC-3T manufacturer. Max OD 12.5, 22, 40mm (1/2", 7/8", 1-9/16") Yieh Chen is a high-quality Cam Driven Thread Rolling Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Auto Feeding Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B06.html): The Auto Feeding Machine Is Assembled With Thread Rolling Machine. manufacturer. Yieh Chen Customized Auto Feeder with load and Un-loading System) Yieh Chen is a high-quality Auto Feeding Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Standard / Special / Customized Rolling Dies | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/B07.html): Standard/Special Thread Rolling Dies or Knurling Dies manufacturer. Yieh Chen manufacture standard roller which assembled with our machines. Any kinds of thread can be made such as UNC, UNF, BSW, Metric, ACME, Ball Screw, even Tube Thread. We also provide services for customized roller manufacturing (At least 5 sets for each inquiry). Yieh Chen is a high-quality Standard / Special / Customized Rolling Dies, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. ## Other Machine - [Other Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/C_Other_Machine.html): Spline Rolling Machine, Multi Forming Machine and Special Purpose Machine manufacturer. We offer customer rigid machine with function of precision, durable, simple operation, easy maintenance and competitive price. Moreover, we design fully automation production lines for wire forming machine, special purpose machine, entire automation production lines are all in our service areas in order to provide total solution for customers. Yieh Chen is a high-quality Other Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Spline Rolling Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/C01.html): Cold form Spline Rolling Machine manufacturer. The concept of Spline Rolling Machine(Cold form rolling machine of splines) was conceived more than10 years ago. YIEH CHEN R&D team takes around 3 years to develop this model. Yieh Chen is a high-quality Spline Rolling Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Multi Forming Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/C02.html): MULTI WIRE, STRIP, Spring Forming Machine manufacturer. We are the specialist in Taiwan in the manufacture of a series of machinery for making hooks, snaps, buckles, shackles, electric parts, spring, clamp, paper clip, oil seal spring and etc. Yieh Chen is a high-quality Multi Forming Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. - [Special Purpose Machine | Maximizing Efficiency with Spur Gears: A Guide to Yieh Chen's Precision Components for Aerospace and Agriculture](https://www.yiehchen.com/en/category/C03.html): Special Purpose Machine manufacturer. Yieh Chen Special Purpose Machine Manufacturer is capable of providing customized service not only for Auto feeding system but also for automation. Automation is designed to alliance of each working process from raw material (coil or strip type) to the end process of finished products such as rod chamfering, thread rolling, bending, nut screwing into both side as Picture shown. For more special purpose machinery information or various needs please feel free to contact us, the leading supplier of special purpose machines! Yieh Chen is a high-quality Special Purpose Machine, spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is an affiliate of Six Star Group, founded in 1975. With over 40 years of experience, we are an AS9100 & ISO9001 certified manufacturer of precision gears and thread rolling machines, serving industries from aerospace to industrial machinery worldwide. ## News - [Yieh Chen high-quality spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan | Yieh Chen Machinery Co., Ltd.](https://www.yiehchen.com/en/news/index.html): Maximize your production with Yieh Chen's heavy-duty hydraulic thread rolling machines, available in YC-970P, YC-860P, and YC-750P models. Designed for maximum durability and performance with up to 120mm OD capacity. Get a quote today! - [Quality and Safety Confirmed! Yieh Chen Thread Rolling Machine Series Complies with the Latest EU Machinery Regulations | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-017.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Yieh Chen Machinery Successfully Renews AS9100 Aerospace Quality Management System Certification | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-016.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Yieh Chen at the 3/20 Aerospace & Defense Event: Advancing the National UAV Team | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-015.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Taipei Aerospace & Defense Technology Exhibition 2025 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-014.html): Yieh Chen Machinery will participate in the Taipei Aerospace & Defense Technology Exhibition 2025. Date: Sep. 18-20, 2025 Venue: Taipei Nangang Exhibition Center, Hall 1 Booth: J0227 We sincerely invite you to visit our booth and explore our latest aerospace gear solutions, worm gears, and precision components. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [2025 TIMTOS Taipei International Machine Tool Show | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-013.html): [Yieh Chen Machinery Co., Ltd. Will Participate in the 2025 TIMTOS Exhibition] As one of Asia's most influential platforms for machine tools and smart manufacturing, TIMTOS provides the perfect stage to showcase cutting-edge technologies and innovative products. This year, we are excited to present our latest technological breakthroughs and solutions, dedicated to creating greater value for our customers. In this exhibition, we will focus on intelligent automation and precision machining, showcasing machinery that aligns with future trends. We warmly invite you to visit our booth to experience the latest technologies firsthand and engage in discussions with our professional team. At Yieh Chen Machinery, we are committed to driving industrial upgrades through technological innovation. We look forward to meeting you at the 2025 TIMTOS and exploring the future of the industry together! Stay tuned for more updates! Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Taiwan International Fastener Show 2024 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-012.html): Yieh-Chen Machinery will participate in the 2024 Taiwan International Fastener Show this year. Fastener Taiwan is the ONLY international B2B fastener show in Taiwan. Serving as a trading platform for sourcing and procurement, Fastener Taiwan features a complete range of fastener products. To better illustrate Taiwan's image of “the Kingdom of Screws”, the show also presents a highly integrated supply chain of Taiwan's fastener industry. The exhibition content includes raw materials, molds, and hand tools area (new exhibition area), fastener finished product area, and machinery equipment area. Our company will also exhibit equipment! Welcome to visit! Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [TIMTOS X TMTS 2022 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-011.html): TIMTOS+TMTS 2022 is the largest trade show in Taiwan specifically catering to the metal cutting tools, metal forming machines, machine parts and related industries. We are honored to introduce our new products by participating in this exhibition. We will launch the latest model of thread rolling machine "YC-970P" this year. Be sure to visit us in booth M0510 to learn more about our company and new product. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [TIMTOS 2021 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-010.html): The overall exhibit space is over 100,000 square meters, making TIMTOS the second largest machine tool show in Asia. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [TIMTOS 2019 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-009.html): The overall exhibit space is over 100,000 square meters, making TIMTOS the second largest machine tool show in Asia. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [M-Tech 2018 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-008.html): M-Tech is Japan's largest exhibition gathering all kinds of mechanical parts such as bearings, fasteners, mechanical springs and metal and plastic processing technology. M-Tech attracts a significant number of professionals from design, development, manufacturing, production engineering, procurement and quality control departments, who are looking to buy solutions for their businesses. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [TIFS2018 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-007.html): Fastener Taiwan is the ONLY international B2B fastener show in Taiwan. Serving as a trading platform for sourcing and procurement, Fastener Taiwan features a complete range of fastener products. To better illustrate Taiwan's image of “the Kingdom of Screws”, the show also presents a highly integrated supply chain of Taiwan's fastener industry. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [TIMTOS 2017 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-006.html): The overall exhibit space is over 100,000 square meters, making TIMTOS the second largest machine tool show in Asia. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [IMTS 2016 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-005.html): The International Manufacturing Technology Show is one of the largest industrial trade shows in the world, featuring more than 2,000 exhibiting companies and 114,147 registrants. The event is held every two years in September at McCormick Place, Chicago. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Gear Expo 2015 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-004.html): Owned by the American Gear Manufacturers Association (AGMA), Gear Expo is a biennial event and the world's only conference and expo designed exclusively for the gear industry. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [TIMTOS 2015 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-003.html): TIMTOS (The 2015 Taipei Int’l Machine Tool Show) is bench marking its 25th cycle at unprecedented size and scale to offer a vast expo of advanced machine tools, valuable seminars, award-winning products and more! Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [TMTS 2014 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-002.html): EXHIBIT PROFILE: (1) Metal Cutting Machines, (2) Metal Forming Machines, (3) Tube and Wire Processing Machines, (4) Components, Parts, Tools, Cutters, Measuring Instruments, Molds, Software & Accessories, (5) Automation & Robotics, (6) International Associations & Media Area Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [Proudly certified by AS9100 in year 2014 | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance](https://www.yiehchen.com/en/news/news-001.html): We proudly announce the certification of AS9100 in year 2014, the milestone of Six Star Group to advance further in Aerospace field with our professional gear products. Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. ## FAQ - [Yieh Chen high-quality spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan | Yieh Chen Machinery Co., Ltd.](https://www.yiehchen.com/en/faq/index.html): Yieh Chen Machinery Co., Ltd., part of Six Star Group, offers a vast range of meticulously engineered gear and transmission components certified under ISO9001 & AS9100. With expertise in producing spur gears, helical gears, worm shafts, and more, Yieh Chen serves critical industries including aerospace and agriculture. Their state-of-the-art production facilities are designed to meet international standards such as DIN and AGMA, ensuring top-tier quality and reliability. - [FAQ for Gear of Yieh Chen | Yieh Chen's Spline Rolling Machines: Essential Equipment for Automotive and Aerospace Drivetrains](https://www.yiehchen.com/en/faq/FAQ-gear.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen is a high-quality spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. - [FAQ for Machine of Yieh Chen | Yieh Chen's Spline Rolling Machines: Essential Equipment for Automotive and Aerospace Drivetrains](https://www.yiehchen.com/en/faq/FAQ-machine.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen is a high-quality spur gears, helical gears, worm shafts, thread rolling machines and spline rolling machines manufacturer from Taiwan since 1984. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. ## E-CATALOG - [E-CATALOG | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/e-catalog.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. ## Contact Us - [Contact Us | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces](https://www.yiehchen.com/en/page/contact-info.html): Accelerate your manufacturing processes with the Yieh Chen YC-530PS(H) High-Speed Hydraulic Thread Rolling Machine. Designed for precision and speed with up to 80mm OD capacity. Perfect for high volume production environments. Yieh Chen Machinery Co., Ltd. is a gear manufacturer of gear for air screw compresser, cnc lathes, machining center, printing machines and more. Also, we providing quality thread rolling machine, spline rolling machine, multi forming machine. ## Language - [English](https://www.yiehchen.com/en/index.html) - [Español](https://www.yiehchen.com/es/index.html) - [Português](https://www.yiehchen.com/pt/index.html) - [Deutsch](https://www.yiehchen.com/de/index.html) - [Русский](https://www.yiehchen.com/ru/index.html) - [العربية](https://www.yiehchen.com/ar/index.html) - [हिन्दी](https://www.yiehchen.com/hi/index.html) - [Indonesia](https://www.yiehchen.com/id/index.html) - [ไทย](https://www.yiehchen.com/th/index.html) - [Việt](https://www.yiehchen.com/vi/index.html) - [Türkçe](https://www.yiehchen.com/tr/index.html) - [Français](https://www.yiehchen.com/fr/index.html) - [فارسی](https://www.yiehchen.com/fa/index.html) - [українська](https://www.yiehchen.com/uk/index.html) - [Latine](https://www.yiehchen.com/la/index.html) - [中文 (繁體)](https://www.yiehchen.com/zh-TW/index.html) - [中文 (简体)](https://www.yiehchen.com/zh-CN/index.html) - [日本語](https://www.yiehchen.com/ja/index.html)