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ATI Stellram offers its NL-series turning grades designed for increased metal removal rates. According to the company, the inserts reduce friction and improve surface finish, while the CVD coatings with improved adhesion are said to enable longer tool life. Five turning grades are available.
The NL200 is designed for machining cast iron and offers high resistance to wear and deformation. The grade is suitable for medium and finishing applications on gray and malleable cast irons. The NL250 is a wear-resistant grade for semi-finishing and finishing applications suitable for stable conditions with limited interrupted machining.
The NL300 is designed to resist wear for medium to rough machining with light scale but no interruption. It is a general-purpose insert for steels and cast iron materials. The NL400 is also designed for medium to rough machining but can accommodate light interruption. The insert provides thermal-diffusion resistance for stainless steel and exotic alloys.
The NL920 provides a fine grain with a tough grade for edge security on steels and stainless steels. The insert is designed for rough and heavy machining applications, including interrupted applications.