Our company was formerly known as Changsha Double Star Gear Industrial Co., Ltd, which was established in 1994. It is a directly affiliated university-run enterprise founded by Central South University Professor Zeng Tao, the leading expert on spiral bevel gears in China. It was later renamed as Changsha Senjie Gear Co., Ltd (abbreviated as "CSG") in 2016. CSG is a production R&D base specializing in professional design, reserch, manufacture and sales of high-quality small module spiral bevel gears and high reduction hypoid gears and cylindrical gears. In 2023, Hunan Dinghan New Material Technology Co., Ltd. was established as a specialized international export business department. CSG has strong scientific research and development capabilities and is also equipped a full set of advanced equipment including seven-axis five-linkage CNC spiral bevel gear grinding machines and gear milling machines. By making the best use of the scientific and technological achievements and equipment of the Gear Research Institute of Central South University, machanical processing, heat treatment and testing. We have developed high-quality products featuring high reduction, high speed, heavy load, low noise and less teeth for users.
With the quality policy of "scientific and technological innovation, quality first, being first-class firm and customer‘s satisfaction", we have won the trust of well-known domestic and abroad enterprises with stable and excellent quality. It is committed to be a pioneer of the industry of China's small-module spiral bevel gears, and is dedicated to providing service for any related industry requiring industrial robots, CNC turning and milling compound power tool turrets, industrial sewing machines, reducers, bicycles, power tools and aeromodelling. We sincerely look forward to your cooperation!
Technological innovation, Quality first, Striving for first-class excellence, Satisfying customers
We are committed to be a pioneer of the industry of China's small module spiral bevel gear, and dedicated to providing service for any related industry requiring industrial robots, CNC turning and milling compound power tool turrets, industrial sewing machines, reduction gears, bicycles, power tools, and aeromodelling.
Non-standard customization of Dinghan gears, we can realize gear design, strength calculation, contact analysis, tool calculation, tooth profile error reversal and other functions. we have rich experience and you can be connected by dedicated personnel.
We have strong scientific research and development capabilities and a complete set of advanced equipment such as multiple seven-axis five-linkage CNC spiral bevel gear grinding machines and gear milling machines. By making the best use of the scientific and technological achievements and equipment of the Gear Research Institute of Central South University, mechanical processing, heat treatment, testing technology and technical equipment, we have successively developed high-quality products featuring high reduction, high speed, heavy load, low noise, and less teeth for users.
Our company has a complete set of software to realize digital closed-loop manufacturing of spiral bevel gears, Functions such as gear design, strength calculation, contact analysis, tool calculation, tooth profile error reversal, etc. can be realized. Machining methods include five tools machining(fixed setting) & G-plete of tapper , spiral format tilt(SFT) method & hypoid format tilt (HFT) method of Cycloid equidep, etc,
We currently have one doctorate in spiral bevel gears (member of China Gear Standardization Technical Committee) and one graduate student, who have made great contributions to the company's gear R&D and design.
At the same time, our team has rich experience in the gear industry, unites and cooperates under a clear division of labor, makes progress together, and is committed to representing the industry level of China's small module spiral bevel gears.
1994 We were formerly known as Changsha Double Star Gear Industrial Co., Ltd.It's is a wholly-owned and directly affiliated enterprise of Central South University.
2016 Changed to Changsha Senjie Gear Co., Ltd.
2023 Hunan Dinghan New Material Technology Co., Ltd. was established as a specialized international export business department.