CNMG 120412 AH6225 Wendeplatten - Tungaloy

Take advantage of the combination of a PVD‑coated AH6225 carbide grade, a sharp yet stable cutting edge, and a secure cylindrical‑hole clamping for consistent chip control and reliable turning of rostfreier Stahl; order via Metav Werkzeuge or consult our specialists for matching holders and spare screws.

CNMG 120412 AH6225 — Tungaloy turning insert (ISO CNMG), PVD‑coated carbide, 80°

A CNMG120412 AH6225 insert for ISO‑standard turning, designed for robust performance when machining rostfreier Stahl in external and internal turning operations.

• ISO-standard rhombic CNMG geometry
• PVD-coated carbide AH6225 for rostfreier Stahl
• Sharp yet stable cutting edge, 80° lead angle
• With cylindrical hole for secure clamping

Enhanced productivity for stainless machining with consistent surface quality

This turning insert is engineered to deliver stable metal removal when facing the challenges of rostfreier Stahl. The AH6225 grade combines a hard PVD coating with a tough substrate to maintain a sharp cutting edge under changing conditions, which reduces the need for frequent edge changes and supports longer tool life. The result is more predictable cycle times and a measurable improvement in surface finish compared with uncoated grades. For operations with medium cutting parameters, the balanced wear behaviour translates directly into lower process variability and improved throughput.

Secure seating and geometry that improve process reliability

The rhombic CNMG shape paired with a cylindrical hole and standard fastening ensures accurate, repeatable seating in compatible holders. The 80° approach angle and the 1.2 mm corner radius promote a controlled cutting action that moderates cutting forces and enhances stability on both external and internal turning tasks. Clearances and tolerances conform to ISO expectations, so compatibility depends on matching form, clearance angle, tolerance class, fastening and insert thickness to the chosen toolholder, enabling predictable fixture performance on the shop floor.

Grade and coating explained for practical decision making

The PVD coating on this carbide grade improves heat resistance and reduces built‑up edge during rostfreier Stahl machining, while the substrate maintains edge integrity under intermittent loading. In practical terms, PVD‑coated carbide reduces adhesion and thermal softening at the cutting zone, which means fewer unplanned tool changes and cleaner part surfaces. Select this insert when the production mix includes medium‑duty turning of corrosion‑resistant alloys and when a compromise between sharpness and wear resistance is required.

Clear specification data to match holders and applications

Key geometrical and functional details—rhombic CNMG form, 12 mm inscribed circle, 4.76 mm thickness, 1.2 mm corner radius, 0° clearance angle and a double‑sided chipbreaker—support straightforward selection for general turning tasks. The double‑sided chipbreaker extends usable edges per insert, while the cylindrical hole supports positive clamping. Use these measurable values to verify holder compatibility and to plan insert inventory for batch runs or mixed‑material workshops.

For reliable turning of rostfreier Stahl, contact Metav Werkzeuge for tailored holder recommendations or to procure the Tungaloy CNMG120412 AH6225 insert; Metav Werkzeuge is available at info@metav-werkzeuge.com or +49 2822 7131930

Technical Data

• Article number: 6946859
• SKU: 6946859-Tungaloy
• Manufacturer SKU: TUN6946859
• Manufacturer article number: 6946859

Facts

• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 1.2 mm
• Lead angle: 80°
• Clearance angle: 0°

Special features

• Grade: AH6225 (PVD‑coated carbide)
• Geometry: rhombic (CNMG)
• Hole: with cylindrical hole
• Chipbreaker: double-sided
• Application: Turning
• Model series: ISO turning inserts

FAQ

What materials is this insert best suited for?
The CNMG120412 AH6225 insert is optimised for machining rostfreier Stahl; the PVD‑coated carbide grade provides improved resistance to adhesion and thermal effects common with corrosion‑resistant alloys.

How does the AH6225 grade affect machining performance?
AH6225 offers a balance between a sharp cutting edge and durable wear resistance, enabling stable performance across medium cutting conditions and variable production demands with the Tungaloy CNMG insert.

Which holders are compatible with this insert geometry?
Compatibility depends on matching the CNMG form, 80° lead angle, 4.76 mm thickness and the insert’s cylindrical hole to the chosen external holder or boring bar; verify holder specifications before fitting the insert.

Can both sides of the insert be used?
Yes, the insert features a double‑sided chipbreaker, allowing use of multiple cutting edges per insert and extending the effective tool life.

What is the purpose of the cylindrical hole?
The cylindrical hole secures positive clamping and helps ensure repeatable seating in ISO‑compliant toolholders, reducing the risk of misalignment during heavy cuts.

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.