CNMG 120408 NS520 Wendeplatten - Tungaloy

Benefit from a combination of consistent surface finish, stable wear behaviour from the NS520 cermet grade and ISO interchangeability for faster tool changes; order via Metav Werkzeuge or consult our specialists for application support.

CNMG 120408 NS520 — ISO CNMG indexable turning insert for turning, cermet finish (Tungaloy)

The CNMG 120408 NS520 is an ISO‑profile indexable insert designed for finishing and light turning of steel, delivering improved surface quality and predictable tool life in routine production environments.

• ISO CNMG profile for secure clamping
• NS520 cermet for fine finishing
• 0.8 mm nose radius for accurate contours
• Double-sided chipbreaker with cylindrical hole

Superior surface quality through optimised cermet chemistry

The NS520 grade is a cermet developed for finishing to light machining of steel, prioritising surface finish and dimensional stability. Its microstructure gives a finer cutting edge and reduced built-up edge compared with many carbide grades, which results in more consistent part quality and longer intervals between edge changes. For users seeking predictable, repeatable surface integrity in serial production, the NS520 chemistry supports stable wear progression and less frequent rework.

Seamless integration with ISO tooling systems for process stability

Built to the ISO CNMG form, the insert matches standard CNMG holders when dimensions and tolerance classes align. Compatibility depends on form, relief angle, tolerance class, fastening method, size and thickness; the rhombic geometry and 80° approach angle provide a secure orientation for both external and internal operations. By using ISO‑conforming indexable inserts, set‑up times and inventory complexity are reduced, supporting higher machine utilisation and straightforward tool changeovers.

Application guidance for efficient turning and reliable results

With a 0.8 mm nose radius and a double‑sided chipbreaker, this insert suits finishing passes and light interrupted cuts where controlled chip formation and good surface finish are essential. The insert is designed for turning applications where rigidity and correct grade selection matter; choose the chipbreaker and cutting data based on material, cut depth and machine stability to achieve the best economy. When machining steel, the combination of the rhombic shape, 0° relief and NS520 cermet helps to maintain dimensional accuracy while minimising burr and edge deterioration.

For consistent finishing performance with Tungaloy NS520, contact Metav Werkzeuge for application advice or to secure stock — info@metav-werkzeuge.com · +49 2822 7131930

Technical data

• Article number: 6802132
• Manufacturer SKU: TUN6802132
• Model series: ISO-Drehwendeschneidplatten
• Manufacturer: Tungaloy

Core data

• ISO designation: 120408
• Insert size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Relief angle: 0°
• Approach angle: 80°

Design & special features

• Material: Hartmetall (cermet option indicated)
• Grade: NS520
• Insert form: rhombic
• Hole: with hole
• Hole style: cylindrical hole
• Chipbreaker: double-sided
• Typical application: turning

FAQ

Which materials is this insert suited for? The CNMG 120408 NS520 insert is formulated primarily for machining steel in finishing to light cuts; the NS520 cermet grade emphasises surface quality and uniform wear for turning operations.

How does NS520 cermet compare with standard carbide grades? NS520, as a cermet option, provides a finer edge for improved surface finish and reduced built‑up edge versus many conventional carbide grades, making it well suited for finishing passes on steel components.

Is the insert compatible with standard CNMG holders? The insert uses the ISO CNMG form; compatibility with a given holder is determined by form, relief angle, tolerance class, fastening, size and thickness, so matching those parameters ensures safe clamping and repeatable positioning.

Can this insert be used for internal turning as well as external turning? Yes, the geometry and construction of this CNMG indexable insert are suitable for both external and internal turning applications when the correct holder and process parameters are employed.

Manufacturer/Responsible: Tungaloy-NTK Germany GmbH, Katzbergstraße 3a, 40764 Langenfeld - Protected trademarks and product names are the property of their respective owners. Brand names and protected trademarks are mentioned solely for explanatory purposes. There is no affiliation between our company and the mentioned brands. The item offered is an original, brand-new product from the manufacturer.