CNGA 120408 NS520 Wendeplatten - Tungaloy

Take advantage of the combination of precision cermet performance, ISO conformity and easy integration into standard holders for dependable finishing results; order the insert directly via Metav Werkzeuge or contact the consultants for application advice.

CNGA 120408 NS520 turning insert by Tungaloy — cermet grade for finishing, 80° rhombic

The CNGA120408 NS520 is an ISO‑standard turning insert designed for finishing to light turning of steel, offering a fine surface finish and consistent dimensional control in automated and manual lathes.

• ISO‑compatible rhombic geometry, 80° angle
• Cermet NS520 for fine finishing operations
• 0.8 mm nose radius for accurate profiles
• Cylindrical locating hole, secure clamping

Consistent surface quality and predictable wear

The cermet NS520 grade is optimised for finishing to light machining of steel, delivering a consistently high surface finish and even wear behaviour. Compared with conventional grades, this cermet composition emphasises dimensional stability and predictable tool life, which reduces rework and inspection cycles. The combination of a fine cutting edge and a 0.8 mm nose radius supports tight tolerances and improved part appearance without aggressive cutting loads.

Easy integration into ISO tool systems for fast setup

Designed as an ISO‑standard indexable insert, compatibility with external holders is determined by form, clearance angle, tolerance class, clamping and thickness. The rhombic 80° geometry and the cylindrical locating hole enable secure, repeatable seating in most standard external toolholders and boring bars. This reduces setup time, minimises indexing errors and supports a continuous production flow when exchanging inserts.

Durable cermet construction for finishing performance

Manufactured from high‑quality carbide substrate with a cermet or coated cermet cutting material, the insert balances edge strength with wear resistance. The NS520 grade focuses on achieving superior surface quality and uniform wear patterns, making it especially suitable for customers prioritising part finish and process stability over aggressive metal removal. The 4.76 mm thickness contributes to stiffness in the clamped stack, supporting accurate chip control during light turning.

Practical application notes and typical uses

Intended for external and internal turning operations, this insert performs best in finishing passes or light cuts where surface quality and accuracy are priorities. The absence of a chipbreaker in this variant suggests use with stable setups and controlled feeds to avoid long, stringy chips; pairing with an appropriate holder and clamping kit is recommended for optimal results. For brazed or coated options, matching the grade to workpiece material and machining parameters ensures the expected performance and tool life.

For procurement or process consultation regarding the Tungaloy cermet insert, contact Metav Werkzeuge — Metav Werkzeuge can advise on holder compatibility and supply options via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 6801835
• Manufacturer SKU: TUN6801835
• SKU: 6801835-Tungaloy
• Model series: ISO turning inserts

Core specifications

• Geometry: rhombic, 80°
• Clearance angle: 0°
• Nose radius: 0.8 mm
• Plate size: 12 mm
• Plate thickness: 4.76 mm
• Hole: with hole (cylindrical)

Materials and features

• Material: carbide
• Grade/coating: NS520 (cermet or coated cermet)
• Application: Turning
• Chipbreaker: without

FAQ

What materials is this insert best suited for? The CNGA120408 NS520 insert is formulated for finishing to light machining of steel, where the NS520 cermet emphasises surface quality and dimensional stability.

How is the insert secured in the holder? Clamping and compatibility follow ISO standards; the rhombic shape and cylindrical hole enable secure seating in compatible external holders and boring bars for repeatable positioning.

Is this insert suitable for heavy roughing? This cermet grade is designed for finishing and light cuts rather than heavy roughing; for high metal removal rates, a different grade or geometry would be more appropriate.

What benefit does the 0.8 mm nose radius provide? A 0.8 mm nose radius supports accurate profile generation and improved surface finish, helping to meet tighter tolerance requirements with consistent results.

Does the product include a chipbreaker? This variant is supplied without a chipbreaker and is best used in stable setups with controlled feeds to manage chip formation effectively.

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.