Quality | Enhance Your Production Line with Yieh Chen Thread Rolling Machines: Precision Engineering for Optimal Performance

Quality | Yieh Chen is your Thread Rolling and Spline Rolling solution. Yieh Chen of Six Star Group is an ISO9001 & AS9100 Certified Manufacturer of Gears transmission components and transmission components.


In the gear world, a deviation of mere micrometers can mean the difference between performance success and failure.

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.

TypePrecision Grade