CNMG 120408 AH6225 Wendeplatten - Tungaloy

Benefit from the combination of a PVD‑coated carbide AH6225 grade and a 0.8 mm corner radius for consistent stainless‑steel turning and reduced insert changes; order directly via Metav Werkzeuge or consult our specialists for application advice.

CNMG 120408 AH6225 – Tungaloy indexable turning insert for stainless‑steel machining

The CNMG120408 AH6225 is an ISO‑standard rhombic indexable insert designed for reliable external and internal turning, offering a sharp yet stable cutting edge for variable mid‑range machining conditions.

• ISO rhombic CNMG geometry
• PVD‑coated carbide grade AH6225
• 80° included angle for robust cutting
• Double‑sided chipbreaker, 0.8 mm radius

Consistent cutting performance for stainless steels

The CNMG120408 AH6225 insert combines a PVD coating with a tough carbide substrate to deliver a sharp, durable cutting edge specifically tuned for stainless steels. This pairing improves resistance to built‑up edge and wear under fluctuating temperatures, which in practice means fewer indexings and more predictable cycle times. Specifying a universal grade like AH6225 reduces the need for multiple inserts across similar jobs, helping to streamline inventory and conserve spindle time during batch production.

Geometry and holder compatibility that simplify setup

An ISO‑standard CNMG shape with an 80° included angle, 0° clearance angle and rhombic form gives a strong cutting corner suited to a wide range of turning operations. The insert features a cylindrical hole for positive clamping and measures 12 mm across with a 4.76 mm thickness, parameters that define compatibility with standard external holders and boring bars. When selecting a holder, match form, free angle, tolerance class, fastening style and thickness to ensure correct seating and repeatable indexing, thereby reducing setup time and vibration‑related rejects.

Reliable chip control and adaptable application range

A double‑sided chipbreaker in combination with the AH6225 grade provides controlled chip formation for both external and internal turning. The chipbreaker and grade are chosen to suit workpiece material, machining mode and setup rigidity: when stability is limited, the chipbreaker helps prevent long, tangled chips and supports safer automatic machining. The combination supports improved surface finish and steady tool life, translating into greater process certainty for batch and single‑piece production alike.

Practical handling, economical indexing and selection tips

The 0.8 mm corner radius balances edge strength and surface quality: it enhances robustness where slight interruptions or harder inclusions occur, while still permitting reasonable surface finish when feed and depth of cut are adjusted accordingly. Using a double‑sided insert halves the cost per indexed edge compared with single‑sided types and contributes to lower tooling expenditure over time. The system concept comprises the ISO insert, a compatible external holder or boring bar, a clamping pad or set and replacement screws — a compact supply chain that supports quick maintenance and consistent repeatability. For further application data or machining parameter guidance, Metav Werkzeuge provides technical support via email or phone.

For tailored selection and practical advice on Tungaloy CNMG120408 AH6225 inserts, contact Metav Werkzeuge at info@metav-werkzeuge.com or +49 2822 7131930 for application‑specific recommendations and availability

Technical data

• Article number: 6903179
• Manufacturer SKU: TUN6903179
• Internal SKU: 6903179-Tungaloy
• Description: CNMG120408 AH6225 Tungaloy indexable insert

Facts

• ISO designation: 120408
• Corner radius: 0.8 mm
• Thickness: 4.76 mm
• Size: 12 mm
• Included angle: 80°
• Clearance angle: 0°

Special features

• Material: carbide
• Coating: PVD
• Shape: rhombic (CNMG)
• Hole: with hole (cylindrical hole)
• Chipbreaker: double‑sided
• Application: turning
• Grade: AH6225, optimised for stainless steels

FAQ

What materials is this insert best suited for?
The CNMG120408 AH6225 insert is optimised for stainless steels; the AH6225 PVD‑coated carbide grade balances edge sharpness and stability for common stainless‑steel turning tasks.

How does the 0.8 mm corner radius affect performance?
A 0.8 mm corner radius increases edge strength and resistance to interruption while still allowing acceptable surface finish when feeds are adjusted; it is a good compromise for mixed‑stability turning operations with the Tungaloy insert.

Is this insert compatible with standard CNMG holders?
Yes—being ISO‑standard CNMG (120408) the insert mates with holders designed for CNMG‑type inserts, provided form, thickness (4.76 mm), free angle and clamping style are matched.

What advantages does the PVD coating provide?
The PVD coating on the AH6225 grade improves wear resistance and reduces built‑up edge formation during stainless‑steel turning, which supports longer tool life and steadier process performance.

Can this insert be used for internal and external turning?
Yes; the rhombic CNMG geometry and double‑sided chipbreaker make the insert suitable for both external and internal turning applications when the correct holder and cutting parameters are selected.

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.