CNMA 120408 NS520 Wendeplatten - Tungaloy

Take advantage of the combination of precision finish, ISO compatibility and stable cermet performance for consistent turning results; order the insert directly via Metav Werkzeuge or consult our specialists for application-specific recommendations.

CNMA 120408 NS520 Tungaloy turning insert (ISO) — finishing to light machining

A CNMA120408 NS520 indexable insert for ISO‑standard turning, engineered for finishing and light cuts where surface quality and dimensional control are priorities.

• ISO‑standard rhombic CNMA geometry
• Coated cermet grade NS520
• 0.8 mm corner radius for fine finish
• With cylindrical hole; 4.76 mm thickness

High‑quality surface finish and predictable wear

The cermet-based NS520 grade is designed specifically for finishing to light machining of steel, delivering a stable wear pattern and consistent dimensional results. A 0.8 mm corner radius reduces edge chipping while enabling a fine surface texture, which lowers downstream rework. The combination of a hard cutting surface and a robust substrate ensures predictable flank wear, so process windows remain narrow and repeatable during batch production.

Secure clamping and ISO compatibility for dependable setups

The insert follows ISO specifications for form, tolerances and fixing, which simplifies toolholder selection and reduces setup time. Its rhombic 80° geometry and the provision of a cylindrical hole enable positive mechanical location and secure clamping in compatible holders. The plate thickness of 4.76 mm and the 12 mm size contribute to stable mounting and heat dissipation, supporting steady cutting conditions and reducing the chance of vibration‑related imperfections.

Efficient machining strategy and system integration

As part of a standard turning system — indexable insert, suitable external holder or boring bar, support pad and clamping set — this grade supports economical finishing operations with low tendency to build edge debris. The insert is available as cermet or coated cermet, offering a balance between wear resistance and surface quality. With no chipbreaker fitted, the geometry favours continuous, uniform chip flow in light cuts; selecting the appropriate holder and machining parameters will extend service life and maintain component tolerances.

Contact Metav Werkzeuge for tailored application advice and to order the CNMA120408 NS520 insert directly from stock

Technical Data

• Article number: 6801916
• Manufacturer SKU: TUN6801916
• SKU: 6801916-Tungaloy
• Model series: ISO turning inserts
• Manufacturer: Tungaloy

Facts

• Shape: rhombic 80°
• Corner radius: 0.8 mm
• Thickness: 4.76 mm
• Size: 12 mm
• Relief angle: 0°
• With cylindrical hole

Materials & Features

• Grade: NS520
• Cutting material: cermet / coated cermet
• Substrate: carbide
• Application: turning (finishing to light)
• Chipbreaker: none
• Compatibility: ISO holders; depends on form, clearance, tolerance class, fixing, size and thickness

FAQ

What applications is this insert best suited for?
The CNMA120408 NS520 insert is intended for finishing and light turning of steel where surface finish and dimensional consistency are required.

What does the NS520 grade offer compared with conventional grades?
NS520 is a cermet grade developed for superior surface finish and even wear behaviour, making it suitable for finishing passes and parts requiring tight tolerances.

How does the rhombic 80° form affect cutting performance?
The rhombic 80° geometry offers versatile approach angles for external and internal turning, balancing edge strength with access to tight profiles.

Is a chipbreaker included and what does that mean for chip control?
This insert is supplied without a chipbreaker; that favours continuous chip formation and a smoother surface in finishing operations but requires appropriate parameters and coolant strategy.

Which toolholders are compatible with this insert?
Compatibility follows ISO standards; holders must match the insert form, relief angle, tolerance class, fixing method, size and thickness for secure clamping.

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.