CNMG 120412 AH6225 Wendeplatten - Tungaloy

Take advantage of the combination of a PVD-coated AH6225 grade, an 80° rhombic geometry and a 1.2 mm corner radius for consistent performance when machining stainless steel; order genuine Tungaloy inserts via Metav Werkzeuge or consult the technical team for application-specific guidance.

CNMG120412 AH6225 CNMG ISO 120412 turning insert for external and internal turning — Tungaloy

A CNMG120412 AH6225 indexable turning insert engineered for ISO-compatible holders, delivering a sharp yet stable cutting edge for medium turning operations in stainless steel.

• PVD-coated carbide for stainless steel machining
• 80° rhombic geometry for versatile turning
• Cylindrical hole for secure clamping
• Sharp and stable cutting edge for medium cuts

Precision and material fit for reliable cutting performance

The insert’s PVD-coated AH6225 grade combines a hard coating with a tough carbide substrate to balance wear resistance and edge integrity when machining stainless steel. The selection of this grade reduces the risk of rapid edge chipping under variable conditions and supports longer uninterrupted cycles. Designed to the ISO geometry standard, the insert ensures predictable engagement angles and repeatable results on modern turning centres, which contributes to stable process windows and improved throughput.

Robust geometry and dimensional features that aid stability

With an 80° rhombic shape and a 1.2 mm corner radius, the geometry provides a compromise between form strength and cutting accessibility. The 4.76 mm plate thickness and the standard 12 mm inscribed circle size enhance rigidity in both external and internal turning setups, while the cylindrical hole supports secure, concentric clamping. These dimensional characteristics reduce vibration and deflection, translating into improved surface finish and fewer rework cycles when paired with a correctly matched holder and clamping set.

Chip control and edge behaviour for efficient turning

The double-sided chipbreaker design promotes consistent chip formation across a range of cutting depths, helping to maintain process stability in interrupted or continuous cuts. The combination of a sharp geometry and a stable cutting edge allows the insert to perform effectively in medium machining tasks where changeable conditions occur. This behaviour supports higher productive uptime and can lower the frequency of insert changes, improving overall operational economy.

Choosing the right setup and ensuring compatibility

Compatibility with a turning holder or boring bar depends on form, clearance angle, tolerance class, fastening method, size and thickness; therefore the ISO designation simplifies selection across manufacturers. When selecting the ideal chipbreaker and grade, match the AH6225 characteristics to the workpiece material and machine rigidity for optimal results. For complex mixes of operations, consider holders that provide extra support or reduced overhang to fully exploit the insert’s stability advantages.

For reliable machining of stainless steel with a consistent cutting edge, contact Metav Werkzeuge for original Tungaloy CNMG120412 AH6225 inserts and tailored application advice — eMail: info@metav-werkzeuge.com, Tel: +49 2822 7131930

Technical data

• Article number: 6890234
• Manufacturer article number: 6890234
• SKU: 6890234-Tungaloy
• Manufacturer SKU: TUN6890234
• Model series: ISO turning inserts
• Designation: CNMG120412 AH6225

Facts

• Inscribed circle: 12 mm
• Plate thickness: 4.76 mm
• Corner radius: 1.2 mm
• Clearance angle: 0°
• Main angle: 80°

Special features

• Material: carbide
• Coating: PVD-coated (AH6225 grade)
• Hole: with cylindrical hole
• Chipbreaker: double-sided
• Plate shape: rhombic
• Application: external and internal turning; suited for stainless steel
• System: ISO insert requires matching holder, base and clamping set

FAQ

What materials is this insert intended for?
The CNMG120412 AH6225 insert is specified for machining stainless steel, where the PVD-coated AH6225 grade offers a balance of wear resistance and edge stability.

How does the 80° rhombic geometry affect machining?
An 80° rhombic geometry provides versatility for both external and internal turning, offering accessibility to shoulders and better form strength for medium cutting tasks.

What does the cylindrical hole mean for clamping?
The cylindrical hole enables reliable axial positioning and clamping with compatible holders and clamping sets designed for ISO inserts, improving repeatability and concentricity.

Is the chipbreaker suitable for mixed operations?
The double-sided chipbreaker is designed to maintain consistent chip formation across varied cutting depths, making it appropriate for a range of medium turning operations.

How to ensure the insert fits my holder?
Fit is governed by ISO geometry, clearance angle, tolerance class, size and thickness; confirm these parameters against the holder specifications and the insert designation.

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.