Introduction to EST
Factory locations
HIstoric highlights
Main customer area


Provide users with excellent cutting tools and spline gauges while striving to become a leading domestic and world-class manufacturer and supplier to the modern tools industry.


Passionate, honest, disciplined, quality conscious, realistic.


Pioneering & innovative, quality-oriented craftsmanship, teamwork

EST, a leading complex tool manufacturer in China, is going globally!

EST ranks NO.1 among the complex cutting tool and precision spline gauge manufacturers in China and top 5 globally. For 30+ years, EST has been innovating and investing in high-end equipment. The company started with making HSS roughing endmills and grew to a leading manufacturer for complex cutting tools and precision spline gauges. EST is presenting the world a new era of ‘Made in China’.

Patents and awards demonstrate EST’s strong R&D capabilities

EST is committed to continual innovative research and development. It owns a provincial level research center, a national level spline gauge measuring lab, and a provincially awarded research team. EST has nine invention patents and over 50 application patents. EST was awarded the national first prize in technology and many prizes in Chinese machinery industry and some industrial innovation projects were national-funded. EST was also awarded three pioneering products prizes for the helical ring gear broach, the one-pass large broach, and the turbine fir-tree slot broaches set.

EST as an executive member of CMTBA, drafted and greatly contributed to the final GB involute spline standard.  

EST has six experienced engineering teams for the six series of products, and each year the team made new breakthrough on innovative projects.

EST keeps investing in up-to-date technologies and equipment to make the best performance tools. There are over 100 world’s cutting-edge CNC grinding machines and over 500 specialized manufacturing equipment, including the largest PVD coating chamber in Asia. 


Factory locations

EST has its 25-acre-headquarter with workshops for the six series of products in Haiyan, Zhejiang, another hob manufacturing and re-sharpening plant in Wenling, Zhejiang, and a sales & service center in Ira, MI, USA.  


EST has grown into one of the most competitive manufacturers in the world for complex cutting tools and precision spline gauges. EST provides integrated professional solutions in components machining and spline measuring for transmissions, power generators, aircrafts, etc.