CNMG 120408 AH6225 Wendeplatten - Tungaloy

Combining a PVD-coated carbide AH6225 grade with a rhombic CNMG form and an 0.8 mm corner radius, this insert offers stable cutting and wide applicability for medium-duty stainless steel turning; order the CNMG120408 AH6225 directly via Metav Werkzeuge or consult our specialists for matching holders and parameters.

CNMG120408 AH6225 CNMG turning insert (PVD-coated carbide) — Tungaloy

The CNMG120408 AH6225 is an ISO-form indexable insert designed for medium-duty turning operations, combining a sharp, robust cutting edge with a double-sided chipbreaker for consistent performance in stainless steel machining.

• PVD-coated carbide grade AH6225
• Optimised for stainless steel turning
• Rhombic CNMG form, 80° lead angle
• Double-sided insert with cylindrical hole

Reliable performance for stainless steel turning

The PVD-coated carbide AH6225 grade provides a balance between edge sharpness and wear resistance that is particularly suited to stainless steels. The coating increases heat resistance and reduces built-up edge tendency during interrupted cuts, while the substrate maintains toughness. As a result, the insert delivers reproducible surface finishes and predictable tool life in mixed or variable production runs. This makes the component an economical choice where repeatability and process stability are priorities.

Secure seating and repeatable geometry in tooling systems

Compatibility with tooling systems is determined by form, freedom angle, tolerance class, fixation and dimensions; the rhombic CNMG form with an 80° lead angle and a 0° clearance ensures stable seating in standard ISO holders. The 12 mm inscribed circle and 4.76 mm thickness contribute to clamping rigidity, while the cylindrical hole enables reliable fastening and easy indexation. These geometric features reduce vibration and improve dimensional consistency, which simplifies setup and shortens cycle-time variability in serial production.

Practical selection and process benefits for daily use

The double-sided chipbreaker allows two usable cutting edges per side, improving economy without compromising stability. With a 0.8 mm corner radius, the insert balances strength at the cutting edge with the ability to obtain acceptable surface quality in medium-turning passes. Selection of cutting data should follow holder rigidity and workpiece constraints; the grade’s design supports moderate cutting speeds and variable feed conditions typical of stainless steel turning. Should additional process data or holder compatibility be required, the technical team can supply recommended parameters and verification guidance.

For tailored advice on integrating the Tungaloy AH6225 CNMG120408 inserts into a production workflow, contact Metav Werkzeuge for specification support and order placement.

Technical data

• Article number: 6890233
• Manufacturer article number: 6890233
• SKU: 6890233-Tungaloy
• Manufacturer SKU: TUN6890233
• Manufacturer: Tungaloy

Core specifications

• Insert designation: CNMG120408
• Insert size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Lead angle: 80°
• Clearance angle: 0°
• Hole style: cylindrical
• Sidedness: double-sided

Features and materials

• PVD-coated carbide (AH6225)
• Rhombic CNMG plate form
• ISO turning indexable insert
• Application: turning (external and internal)
• Designed for stainless steel machining

FAQ

What materials is this insert intended for? The CNMG120408 AH6225 insert (Tungaloy, SKU 6890233-Tungaloy) is designed primarily for machining stainless steels and similar alloys where a sharp, stable edge is required.

How does the AH6225 grade affect tool life? The AH6225 PVD-coated carbide grade combines thermal resistance and substrate toughness to provide stable wear behaviour and predictable tool life in medium-duty turning applications.

Which holders are compatible with this insert designation? Compatibility depends on the ISO form, clamping method and tolerance class; the CNMG120408 format fits standard CNMG holders with an 80° lead and a cylindrical hole fastening arrangement.

Can the insert be indexed and reused? Yes, the insert is double-sided and indexed; each side offers usable cutting edges, improving cost efficiency per insert.

Is this insert suitable for internal turning as well as external turning? The insert’s rhombic CNMG form and robust geometry make it suitable for both external and internal turning operations, provided the holder and overhang are appropriate.

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.