CNMG 120412 AH120 Wendeplatten - Tungaloy

Benefit from the combination of a PVD‑coated carbide grade AH120, a sharp, wear‑resistant cutting edge and a robust rhombic 80° geometry that supports reliable external and internal turning. Order the CNMG120412 AH120 insert directly via Metav Werkzeuge or consult our specialists for process-specific recommendations.

CNMG120412 AH120 indexable insert for Turning — Tungaloy

The CNMG120412 AH120 is an ISO‑standard rhombic indexable turning insert designed for external and internal turning applications, offering a balance of edge security and repeatable performance.

• PVD-coated carbide grade AH120
• Sharp, wear- and chip-resistant edge
• Rhombic CNMG form with 80° cutting angle
• Cylindrical hole and double-sided chipbreaker

Consistent cutting performance through PVD-coated carbide

The combination of PVD coating and a carbide substrate provides enhanced wear resistance and reduced notch sensitivity, which translates into longer tool life under continuous turning. This insert grade is engineered for situations where a sharp cutting edge and process security are required together; the coating stabilises the cutting edge at elevated temperatures and helps to maintain consistent component quality across runs. Selecting a grade with these properties reduces the risk of premature edge breakdown and supports predictable tool change intervals.

Geometry engineered for edge strength and surface quality

The rhombic CNMG geometry with an 80° cutting angle and a 1.2 mm corner radius improves edge robustness while maintaining accessibility for both external profiles and internal features. The 4.76 mm plate thickness increases bending stiffness in the assembly and helps to reduce chatter on less rigid setups. Together, these geometric parameters support improved surface finish and dimensional control in turning operations, particularly when stability and repeatability are priorities.

System compatibility and economical indexing

This insert conforms to ISO dimensions, ensuring compatibility when choosing a suitable external holder or boring bar: compatibility is determined by form, clearance angle, tolerance class, clamping method, size and thickness. The double‑sided chipbreaker allows indexing to fresh edges, reducing the cost per edge and enabling efficient use of inventory. The presence of a cylindrical hole supports secure clamping with standard clamping sets and replacement screws, simplifying maintenance and minimising downtime.

Practical selection advice and application fit

For optimal results, match the chipbreaker and grade to the workpiece material and the chosen cutting parameters; the right combination balances productivity and tool life. The insert is well suited to turning applications where process reliability and a sharp edge are demanded. When in doubt about holder compatibility or selection of cutting data, consult technical documentation or the supplier to align the ISO insert geometry and grade with machine rigidity and workpiece requirements.

For tailored advice on Tungaloy PVD‑coated inserts and to ensure optimal process reliability, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 6854303
• SKU: 6854303-Tungaloy
• Manufacturer SKU: TUN6854303
• Material: Carbide
• Model series: ISO indexable turning inserts

Facts

• Corner radius: 1.2 mm
• Plate thickness: 4.76 mm
• Plate size: 12 mm
• Cutting angle: 80°
• Clearance angle: 0°

Special features

• Grade: AH120
• PVD coating
• Rhombic plate form (CNMG)
• Cylindrical hole
• Double-sided chipbreaker
• ISO‑standard geometry

FAQ

Which materials is the CNMG120412 AH120 insert suited to machine?
The CNMG120412 AH120 insert, with its PVD‑coated carbide grade, is designed for turning tasks that require a sharp, wear‑resistant edge; selection of the chipbreaker should be matched to the specific workpiece material and process for best results.

Is the insert reversible or indexable?
Yes, the insert features a double‑sided chipbreaker and an ISO rhombic form, allowing indexing to fresh cutting edges to extend usable life and improve cost efficiency.

What are the critical dimensions to check for holder compatibility?
Key dimensions include the plate size (12 mm), plate thickness (4.76 mm), corner radius (1.2 mm) and the 80° cutting angle; compatibility additionally depends on form, clearance angle and clamping method.

How does the AH120 grade influence machining stability?
The AH120 grade combines a PVD coating with a carbide substrate to improve wear resistance and edge stability, supporting process security where consistent cutting performance is required.

Can this insert be used for both external and internal turning?
Yes, the ISO‑standard rhombic geometry and the 80° cutting angle make the insert suitable for both external and internal turning applications, provided an appropriate holder is chosen.

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.