CNMG 120404 AH725 Wendeplatten - Tungaloy

Take advantage of the combination of universal material compatibility, fracture‑resistant AH725 grade and ISO conformity for reliable turning operations; order the insert directly via Metav Werkzeuge or ask our consultants for tailored machining advice.

CNMG120404 AH725 CNMG Turning Insert by Tungaloy — PVD‑coated carbide, 0.4 mm corner radius

CNMG120404 AH725 is an ISO‑standard turning insert designed for external and internal turning, offering a fracture‑resistant grade for varied steels and stainless steels.

• PVD-coated carbide grade AH725
• Universal, fracture-resistant for steel and stainless steels
• Double-sided chipbreaker for stable chip control
• Rhombic CNMG, 0.4 mm corner radius, 80°

Greater process reliability when switching materials

The AH725 grade combines a PVD‑coated carbide substrate with a microstructure optimised for resistance to chipping. In practical terms this means fewer unexpected insert failures when machining different steels and stainless steels, which raises process reliability and reduces scrap rates. The combination of a robust cutting edge and a design suited to smaller tools makes this grade particularly effective where stability and consistent cycle times are essential.

Fewer tool changes and improved surface quality

The double‑sided chipbreaker design supports controlled chip formation and evacuation, which directly contributes to a consistent surface finish and longer in‑machine intervals between indexings. Stable chip control reduces the need for manual intervention and shortens non‑productive time; the result is improved throughput and a lower cost per component while maintaining dimensional accuracy for demanding turning tasks.

Plug‑and‑play integration into ISO tool systems

As an ISO‑standard indexable plate, the insert integrates with holders, shanks and clamping sets selected by form, relief angle, tolerance class and size. The presence of a cylindrical mounting hole and standard geometry ensures predictable clamping behaviour and repeatable seating. For workshop planning, the system typically comprises the insert together with a compatible external holder, a shim or clamping set and replacement screws to maintain consistent assembly quality.

Practical machining guidance for reliable results

Key geometry characteristics influence cutting behaviour: the 0.4 mm corner radius moderates edge strength and surface finish, while the 80° lead angle governs the direction of cutting forces and engagement. Plate thickness of 4.76 mm and a rhombic CNMG form balance rigidity with accessibility in shoulder and profile turning. Select the double‑sided chipbreaker and the AH725 grade for mixed‑material batches or for shorter tools where process security is prioritised over ultra‑high metal removal rates.

Contact Metav Werkzeuge for application recommendations on Tungaloy CNMG120404 AH725 turning inserts and to discuss optimal holder and parameter selection for specific machining tasks.

Technical data

• Article number: 6861334
• SKU: 6861334-Tungaloy
• Manufacturer SKU: TUN6861334
• Model series: ISO turning inserts

Core data

• Designation: CNMG120404
• Grade/sorting: AH725
• Material: cemented carbide (Hartmetall) with PVD coating
• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.4 mm
• Relief angle: 0°
• Lead/approach angle: 80°

Special features

• Rhombic CNMG plate form
• Cylindrical mounting hole
• Double-sided chipbreaker
• Universal, fracture-resistant grade for steel and stainless steels
• For external and internal turning applications
• ISO‑normed geometry for compatibility with standard holders

FAQ

What materials is this insert suitable for?
The CNMG120404 AH725 insert is specified for machining steel and stainless steels and performs well where material mixes occur, thanks to its universal, fracture‑resistant grade.

How does the AH725 grade affect tool life?
AH725’s PVD‑coated carbide composition improves edge stability and wear resistance, providing longer, more predictable tool life under varying cutting conditions.

Is this insert compatible with standard CNMG holders?
Yes — the insert follows ISO CNMG geometry and uses a cylindrical mounting hole, so it is compatible with holders that match form, tolerance class and size.

What are the key geometry considerations for setup?
Pay attention to the 0.4 mm corner radius and 80° approach angle: the radius influences finish and edge strength, while the angle affects cutting force direction and engagement.

Can the insert be used on both external and internal turning?
The CNMG120404 AH725 is designed for both external and internal turning; selection of holder and cutting parameters should reflect stability and accessibility requirements.

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.