CNMG 120412 AH6225 Wendeplatten - Tungaloy

Reliable machining of stainless steels is delivered through the combination of the AH6225 PVD-coated carbide grade and a 1.2 mm corner radius, providing a sharp yet robust cutting edge and consistent surface quality; order the insert directly via Metav Werkzeuge or request cutting data from our consultants.

CNMG 120412 AH6225 indexable insert for Turning — Tungaloy

The CNMG120412 AH6225 is an ISO-standard indexable turning insert designed for external and internal turning, optimised for stainless steels and medium cutting conditions.

• PVD-coated carbide grade AH6225
• 80° rhombic CNMG shape
• 1.2 mm corner radius for strength
• Double-sided chipbreaker, cylindrical hole

Consistent performance for stainless steel machining

The AH6225 grade is a PVD-coated carbide developed as a universal solution for stainless steels, offering a balance between a sharp cutting edge and thermal/mechanical stability. The coating reduces adhesion and wear while the substrate provides toughness under interrupted cuts, so machining stability and component surface finish are improved. This combination is suited to medium cutting parameters and varying operational conditions, supporting repeatable cycle times and predictable tool life. Benefits include reduced rework, fewer insert changes and a more reliable production flow.

Compatibility and mounting explained for secure use

The CNMG geometry with an 80° included angle and a rhombic profile is ISO-standardised; compatibility with the toolholder is therefore determined by insert form, relief (0° in this case), tolerance class, fastening method and plate thickness. The plate measures 12 mm across with a thickness of 4.76 mm and has a cylindrical hole for screw clamping. Compatibility is ensured when the holder matches these parameters, so insert seating, clamp engagement and axial support are correct. Clear identification of holder type and tolerance ensures safe clamping and repeatable positioning during index changes.

Efficient chip control and robust edge life for productivity

A double-sided chipbreaker enables flexible application and cost-effective indexing, while the 1.2 mm corner radius increases edge strength and helps maintain edge integrity during medium-duty turning. The PVD layer improves abrasion resistance and reduces built-up edge on stainless materials, which supports longer uninterrupted machining periods and consistent dimensional results. The cylindrical hole and standardised CNMG form simplify inventory management and replacement, contributing to lower downtime and increased productivity per cutting edge.

Contact Metav Werkzeuge for tailored cutting data, availability and sample requests for the Tungaloy CNMG120412 AH6225 indexable inserts — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 6825073
• Manufacturer SKU: TUN6825073
• SKU: 6825073-Tungaloy
• Model series: ISO-Drehwendeschneidplatten

Facts

• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 1.2 mm
• Included angle: 80°
• Relief angle: 0°

Special features

• Material: carbide
• Coating/grade: AH6225 (PVD-coated)
• Shape: rhombic (CNMG)
• Hole: with cylindrical hole
• Chipbreaker: double-sided
• Application: turning (external and internal)

FAQ

Is this insert suitable for machining stainless steels?
The CNMG120412 AH6225 Tungaloy indexable insert is formulated for stainless steels, combining a PVD coating and a carbide substrate to reduce adhesion and improve wear resistance in those materials.

Which toolholder is required for correct mounting?
Compatibility requires a holder that accepts CNMG inserts with an 80° geometry, matching the plate thickness, relief angle and fastening method; the cylindrical hole requires a corresponding clamp screw and seat.

What does the AH6225 designation indicate?
AH6225 denotes a PVD-coated carbide grade optimised for a broad range of stainless steels, designed to balance cutting-edge sharpness and thermal stability for medium machining.

How does the 1.2 mm corner radius affect performance?
A 1.2 mm corner radius increases edge strength and improves resistance to chipping, producing better tool life and smoother surface finishes in medium cutting conditions.

Can this insert be used for both external and internal turning?
Yes, the insert is designed for both external and internal turning; selection of the appropriate holder and cutting parameters is required for stable results.

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.