VNMG 120408 AH6225 TF Wendeplatten - Tungaloy

Benefit from the combination of ISO compatibility, a PVD‑coated carbide grade designed for stainless steels, and a TF chipbreaker that delivers stable chip control and consistent surface finish; order directly via Metav Werkzeuge or ask the consultants for application advice.

VNMG 120408 AH6225 rhombic turning insert by Tungaloy — ISO‑standard, PVD‑coated carbide for turning

The VNMG120408E-TF AH6225 is an ISO‑standard rhombic turning insert designed for external and internal turning, offering a balance of a sharp yet stable cutting edge for medium machining tasks.

• ISO rhombic insert VNMG120408 format
• PVD-coated carbide grade AH6225
• TF chipbreaker for medium-duty turning
• 0.8 mm corner radius, cylindrical hole

Reliable ISO compatibility for consistent clamping and repeatability

The VNMG series is specified to ISO dimensions, which ensures repeatable clamping and predictable tool behaviour across different holders. The insert form, relief angle, tolerance class, fastening method, size and thickness together determine compatibility with an external holder or boring bar; this standardisation reduces set‑up time and minimises indexing errors. The PVD‑coated carbide AH6225 grade is formulated for use on stainless steels, providing a sharp cutting edge combined with sufficient edge support to handle varying conditions without rapid edge degradation. This results in fewer interruptions for edge changes and a smoother production flow.

Better chip control and surface quality with the TF chipbreaker

The built‑in TF chipbreaker is optimised for medium‑duty turning and aids controlled chip formation, which lowers the risk of long, tangled chips and supports stable machining at varying depths of cut. Improved chip control contributes directly to safer machining and consistent surface finish, especially in tougher alloys where chip behaviour can otherwise be unpredictable. For operations requiring short, segmented chips and reliable evacuation, the chipbreaker geometry reduces secondary operations and cleaning time on the shopfloor.

Design features that balance edge life and finish

Key dimensional attributes—0.8 mm corner radius, 35° wedge angle, 0° clearance angle, and a plate thickness of 4.76 mm—create a compromise between strength and fine finish. The 0.8 mm radius increases the edge’s resistance to chipping compared with smaller radii, while still supporting acceptable surface quality for many turned components. The rhombic geometry and the cylindrical hole enable secure clamping and straightforward indexing, which is particularly useful in mixed‑batch production where rapid, accurate insert changes are required.

Practical system setup and recommended applications

In practice, the cutting system comprises the ISO insert together with a matching external holder or boring bar, plus the necessary shim/clamping kit and spare screws for secure assembly. The grade and chipbreaker combination is aimed primarily at turning stainless steels under medium machining conditions; suitable operations include both external and internal turning where a balance of edge sharpness and robustness is needed. Machine shops and precision manufacturers benefit from using a defined ISO insert format to streamline tooling inventories and ensure process reliability across multiple machines.

For process‑reliable turning with Tungaloy’s PVD‑coated AH6225 grade, contact Metav Werkzeuge for availability and application guidance or request SKU TUN6947431 for procurement and technical advice

Technical data

• Article number: 6947431
• SKU: 6947431-Tungaloy
• Manufacturer SKU: TUN6947431
• Name: VNMG120408E-TF AH6225
• Brand: Tungaloy
• Model series: ISO-Drehwendeschneidplatten
• Material: Carbide

Facts

• ISO code: 120408
• Corner radius: 0.8 mm
• Wedge angle: 35°
• Clearance angle: 0°
• Plate thickness: 4.76 mm
• Plate size: 12 mm

Special features

• PVD-coated carbide grade AH6225
• TF chipbreaker
• Rhombic plate form
• Cylindrical hole
• Application: Turning (external and internal)
• System components: ISO insert, holder/boring bar, shim/clamp set, spare screws

FAQ

What materials is this insert intended for?
The VNMG120408E-TF AH6225 insert is specified as a universal grade for stainless steels, engineered to maintain a sharp, stable cutting edge under medium machining conditions.

How does the TF chipbreaker influence machining?
The TF chipbreaker on the VNMG120408E-TF promotes controlled chip formation, improving chip evacuation and supporting a consistent surface finish during medium‑duty turning.

Which toolholders are compatible with this ISO format?
Compatibility is determined by the ISO form, relief angle, tolerance class, fastening method, size and thickness; the VNMG120408 format fits holders and boring bars designed for VNMG‑type inserts with a 35° wedge angle.

What advantage does the 0.8 mm corner radius provide?
A 0.8 mm corner radius offers increased edge strength for interrupted cuts and medium feeds while still enabling acceptable surface finish for many turned parts.

What components form the complete cutting system?
A typical cutting system includes the ISO insert, a matching external holder or boring bar, plus a shim/clamping set and spare screws to secure the insert within the assembly.

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.