Company Profile

Over 50 Years of Excellence in Thread Rolling & Precision Gears | AS9100 Certified

Overview: 50 Years of Engineering Excellence

Yieh Chen Machinery Co., Ltd. is a proud affiliate of the Six Star Group (Founded in 1975), one of the top five gear manufacturers in Taiwan.

Leveraging over half a century of manufacturing expertise, Yieh Chen has evolved into a Total Solution Provider operating two specialized divisions:

1. Machinery Division

We provide rigid, durable, and precise metal forming solutions:

Thread Rolling Machines: From hydraulic to fully electric (digital control) models.
Spline Rolling Machines: High-efficiency production for automotive shafts.
Smart Automation: Industry 4.0 integration, auto-loading systems, and remote monitoring.

2. Precision Gear Division

Authorized with AS9100 D & ISO 9001 certifications, serving critical industries:

Aerospace & UAVs: Flight-critical components and lightweight drone gears.
Robotics & AGVs: Low-backlash gears for robotic arms and automation.
Industrial Machinery: Custom gears with grinding precision up to JIS Grade 0 / AGMA 15.

Management Philosophy

Inheriting the spirit of the "Six Star Group," our core values drive us to deliver the best for our partners:

Innovation (Vitality): Continuously upgrading technology to meet future market trends.
Efficiency (Systems): Implementing smart management systems to ensure fast delivery.
Sustainability (Development): Committing to ESG goals and eco-friendly manufacturing.
Customer Success (Satisfaction): Your success is our priority; we treat every client as a VIP partner.

History & Milestones

Year	Key Achievement
2018	Achieved AS9100 Rev D Certification upgrade (Aerospace Quality System).
2017	Achieved AS9100 Certification for Precision Gear Manufacturing.
2014	Six Star Machinery (Taichung Plant) achieved AS9100 Aerospace Certificate.
2013	New factory completed at Taichung Precision Machinery Park.
2010	Started development of gears for Solar Tracking Systems (Green Energy).
2006	Officially commenced cooperation with Aerospace industry orders.
1996	Established Chin-Fa Automatic Machinery Co., Ltd (China Branch).
1995	Achieved ISO 9002 Certification.
1992	Established Rollform Tools Co., Ltd. (UK Branch).
1989	Established Summoon Co., Ltd. (Thailand Branch).
1988	Founded Allstar Precision Machinery Co., Ltd.
1984	Yieh Chen Machinery Co., Ltd. founded in Taiwan.
1975	Six Star Machinery Industry Co., Ltd. founded by Six Brothers.