Sumitomo Electric Industries, Ltd. (Head office: Chuo-ku, Osaka, President: Osamu Inoue, hereafter "our company") has developed and launched the new coated carbide grade AC1135U, achieving excellent machining stability and high-quality machined surfaces in small product machining, for sale as of November 2025.

In recent years, components in the automotive and semiconductor manufacturing equipment fields have become increasingly precise, and the demands for small lathe/autolathe tools used for precision parts machining is increasing year by year. In particular, as the use of stainless steel parts with excellent durability and thermal resistance increases, machining of highly corrosion-resistant materials such as SUS316L tend to shorten tool life, leading to increased tool costs and replacement frequency.

To address these issues, our company has developed the new AC1135U grade, ideal for stainless steel machining with improved machining stability, longer tool life and higher machined surface quality. AC1135U, utilising a proprietary coating technology, delivers excellent adhesion resistance and wear resistance in small lathe machining, significantly reduces tool replacement frequency and lowering machining costs.

Our company will continue to pursue technological innovation, providing machining solutions in response to needs for higher accuracy and efficiency.

Coated Carbide Grade AC1135U for Small Lathes/Autolathes

1.    Features

(1) Applying our proprietary PVD* coating technology
AC1135U utilises our company's proprietary PVD coating technology ABSOTECH™ which combines high strength and high hardness, along with adhesion resistance, to realise high machining stability and longer life.

(2) Special surface treatment
A special surface treatment used here for the first time, suppresses adhesion to the cutting edge, a common issue when machining stainless steel, to achieve a significantly higher machined surface quality as compared to conventional grades.

2.    Lineup

Insert: Total of 155 Cat. Nos.



*PVD (Physical Vapour Deposition): A method depositing a thin physical coating on the surface of the target material in the vapor phase