CNMG 120404 AH120 Wendeplatten - Tungaloy

Take advantage of the combination of PVD-coated AH120 grade and a stable rhombic geometry for reliable turning performance; order directly via Metav Werkzeuge or consult the technical team for application-specific advice.

CNMG 120404 AH120 CNMG turning insert for Drehen by Tungaloy

CNMG120404 AH120 is an ISO-standard indexable turn-insert designed for external and internal turning where a sharp cutting edge and process security are required.

• ISO-standard rhombic insert CNMG120404 AH120
• PVD-coated cemented carbide AH120
• 80° approach angle, 0.4 mm corner radius
• Double-sided chipbreaker for secure chip control

High process stability through PVD-coated carbide

The combination of a PVD-coated surface and cemented carbide substrate gives a balanced resistance to wear and edge chipping while maintaining a sharp cutting geometry. This coating reduces built-up edge and enhances thermal stability, which leads to longer tool life in medium to high cutting speeds. The AH120 grade is formulated for wear- and breakage-resistant performance, making the insert particularly suited to applications where consistent surface quality and repeatable tool life are priorities.

Geometry engineered for precision and strength

With an 80° approach angle and a 0.4 mm corner radius, the rhombic shape provides favourable cutting forces and a robust cutting edge that supports both finishing and light to moderate roughing operations. The rhombic profile and a plate thickness of 4.76 mm create a stable contact between insert and holder, reducing vibration and improving dimensional accuracy. Compatibility with ISO holders is determined by form, clearance angle, tolerance class, fixation method, size and thickness.

Efficient chip control and reduced downtime

A double-sided chipbreaker delivers controlled chip formation across a range of cutting conditions, promoting safe evacuation of swarf and minimising rework. The insert’s chip control characteristics help to maintain consistent cutting forces and heat distribution, which in turn reduces unexpected tool changes and contributes to higher productivity. System-wise, the insert is intended for use with a matching external holder or boring bar, support pads and clamping kits plus spare screws for quick replacement.

Practical application and selection guidance

Intended for external and internal turning, the insert performs best when the chipbreaker and grade are chosen to match the workpiece material and machining stability. The ISO designation and the standardized hole (cylindrical) ensure straightforward mounting and repeatable positioning. For applications demanding a sharp edge together with process reliability — for example finishing operations on steels or general-purpose turning — this grade and geometry present a cost-effective balance between performance and lifetime.

For process-stable turning with the AH120 grade and CNMG 120404 geometry, contact Metav Werkzeuge for ordering and tailored machining advice — eMail: info@metav-werkzeuge.com or Phone: +49 2822 7131930 — consultants are available to recommend the ideal holder and cutting parameters.

Technical data

• Article number: 6811615
• Manufacturer SKU: TUN6811615
• SKU: 6811615-Tungaloy
• Model series: ISO turning indexable inserts
• Type designation: CNMG120404

Numbers / Core technical data

• Insert size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.4 mm
• Approach angle: 80°
• Relief angle (clearance): 0°
• ISO code: 120404

Designs / Special features

• Material: cemented carbide
• Coating / grade: PVD-coated, AH120
• Shape: rhombic
• Hole: with cylindrical hole
• Chipbreaker: double-sided
• Application: external and internal turning
• Typical system: indexable insert + matching holder/boring bar + clamping kit and spare screws

FAQ

Which materials can be machined with this insert?
The CNMG120404 AH120 insert is formulated for general turning tasks and the AH120 grade offers wear resistance suitable for many steels and common engineering materials when appropriate cutting data are applied.

Is the insert compatible with standard ISO holders?
Yes. The insert follows ISO-standard dimensions (CNMG120404) and mounts with a cylindrical hole; compatibility requires matching holder form, clearance angle, tolerance class, fixation and size.

What benefits does the PVD coating provide?
The PVD-coated layer on this cemented carbide insert improves thermal and abrasive resistance, reduces built-up edge and helps to preserve a sharp cutting edge during extended running times.

How does the 0.4 mm corner radius affect machining?
A 0.4 mm corner radius offers a compromise between edge strength and surface finish: it supports stable cutting forces for a predictable surface while still allowing good finishing quality.

Can the CNMG120404 be used for finishing and roughing?
The insert’s geometry and double-sided chipbreaker make it versatile; it suits finishing and light to moderate roughing when the chipbreaker, grade and cutting parameters are matched to the workpiece and machine rigidity.

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.