CNMG 120408 AH120 Wendeplatten - Tungaloy

The combination of PVD-coated cemented carbide and an 80° rhombic geometry ensures consistent edge stability and predictable chip formation for demanding turning tasks; benefit from precise integration into ISO tooling systems and secure clamping. Order original Tungaloy indexable inserts via Metav Werkzeuge or consult the specialists for application advice.

CNMG120408 AH120 CNMG 120408 AH120 turning insert — PVD-coated cemented carbide, 0.8 mm corner radius (Tungaloy)

The CNMG120408 AH120 is an ISO-standard rhombic turning insert for external and internal turning, designed to deliver a sharp cutting edge, stable chip control and reliable process security in general turning applications.

• ISO rhombic turning insert, 80° geometry
• PVD-coated cemented carbide grade AH120
• Corner radius 0.8 mm for sharp cutting edge
• Cylindrical central hole, with countersink
• Double-sided chipbreaker for versatile turning

Predictable edge life and repeatable production quality

The PVD-coated cemented carbide grade AH120 offers a combination of wear resistance and fracture toughness that supports consistent tool life across batch production. A well-balanced coating reduces flank wear while preserving a fine cutting edge, which in turn leads to stable component tolerances and fewer rejects. For machining operations where consistent surface finish and repeatable removal rates matter, this insert helps to standardise results and reduce process variance.

Efficient chip control and machining reliability

Equipped with a double-sided chipbreaker and an 80° rhombic form, the insert promotes controlled chip segmentation during both light and medium cutting conditions. The design of the chipbreaker minimises built-up edge and assists in evacuation of swarf, which keeps the machining zone cleaner and reduces the need for frequent stopping. This results in improved cycle times and a smoother production flow for turning operations.

Simple integration into ISO tooling systems

The insert follows ISO dimensions and is compatible with holders that match its form, clearance angle, tolerance class, fastening method, size and thickness. The cylindrical central hole simplifies secure clamping on many standard toolholders, while the 0° clearance angle and 0.8 mm corner radius deliver a precise profile for finishing and semi-finishing passes. The standardisation enables quick tool changes and predictable set-ups on turret lathes and CNC turning centres.

Application guidance for material ranges and cutting tasks

This grade is intended for turning where a sharp edge and process security are required; it performs well in a broad range of steel and alloy applications. Select feeds and speeds according to component rigidity and toolholder stability; a stable assembly and correct selection of the insert grade and chipbreaker will contribute most to improved productivity. For interrupted cuts or heavy roughing, consider appropriate cutting parameters to protect the edge from mechanical shock.

For technical advice on integrating Tungaloy AH120 inserts into production and to place orders, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 — the specialists can recommend suitable holders and grades for each application.

Technical Data

• Article number: 6802122
• Manufacturer SKU: TUN6802122
• Model series: ISO turning indexable inserts

Core dimensions

• ISO designation: CNMG120408
• Insert size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Cutting angle: 80°

Design & features

• Material: cemented carbide
• Coating: PVD-coated cemented carbide (AH120)
• Geometry: rhombic (CNMG)
• Clearance angle: 0°
• Hole: with cylindrical central hole
• Chipbreaker: double-sided
• Application: turning (external and internal)

FAQ

What materials are suitable for this insert?
The CNMG120408 AH120 insert is a PVD-coated cemented carbide grade designed primarily for turning common steels and alloys where a sharp edge and process security are required.

How is the insert secured in the toolholder?
This insert features a cylindrical central hole with countersink and is compatible with ISO-standard clamping systems that match the CNMG form and dimensions.

Can the insert be used for both roughing and finishing?
The grade and 0.8 mm corner radius are suitable for finishing and semi-finishing; for heavy roughing, matching holder rigidity and cutting parameters is recommended to protect the cutting edge.

Is this an indexable, double-sided insert?
Yes, the CNMG120408 AH120 is double-sided with a chipbreaker on each cutting edge, allowing indexable use to maximise tool life.

Which holders are compatible with the CNMG120408 AH120?
Compatibility depends on holder form, clearance angle, tolerance class, fastening and size; standard CNMG-compatible external and internal turning holders are generally suitable.

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.