Gear Components | Explore the Benefits of Helical Gears: Quieter Operation and Enhanced Load Capacity with Yieh Chen

Gear Components | Your total solution for thread rolling machines, spline rolling, chipless forming, and precision gear manufacturing.

Gear Components

Gear Components

Gears For Aerospaces, Agriculture, Robotic Arms, Transmission, Industrial Machines

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.


To meet capacity demands, Six Star constructs a new manufacturing plant and headquarters in The Taichung City Precision Machinery Innovation Technology Park. This plant is with 19,140 square meters area and starts running production from 2013. Furthermore, Six Star invests on new machine equipments which include Gear grinding machines, bevel gear machines, Measurement machines and other basic machine tools for production usage. With new facilities, Six Star can offer increased capacity and more advanced manufacturing processes using the latest technology. Six Star aims to offer top quality, shorter lead time, and reasonable cost of gear products to each esteemed customer by this great milestone.

A High Performance Gear Portfolio

To keep on the forefront of gear innovation, we invest significantly in both hardware and software improvement, including state-of-the-art gear design software and CNC gear machining equipments. The result is a broad, high performance gear portfolio which includes cylindrical gear (internal and external), worm & worm gear, bevel gear, non-involute gear, herringbone gear, helical gearboxes and Epicyclic gearboxes.

Gear Components

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Gear Components | Advanced Worm Shafts by Yieh Chen: Optimizing Gear Solutions for Compact Spaces

Yieh Chen Machinery Co., Ltd. is a leader in the global manufacturing of high-precision gears and transmission components. This ISO9001 & AS9100 certified company, a member of the Six Star Group, offers a comprehensive range of products including Gear Components, spur gears, helical gears, gear racks, worms, worm shafts, and various specialized machines. Yieh Chen's commitment to quality and innovation is evident in their use of advanced technologies and adherence to stringent international standards, making their products essential for diverse and demanding applications in industries such as aerospace and agriculture.

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. 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 has been offering customers durable machine tools for manufacturing, both with advanced technology and 42 years of experience, Yieh Chen ensures that each customer's requirements are met.