SNMG 120408 AH6225 Wendeplatten - Tungaloy

Benefit from the SNMG120408 AH6225’s combination of PVD-coated carbide, a 0.8 mm corner radius and a square geometry for stable edge life and consistent performance in stainless steel turning; order via Metav Werkzeuge or request application advice from our consultants.

SNMG120408 AH6225 Tungaloy indexable turning insert — PVD-coated carbide, 0.8 mm corner radius

The SNMG120408 AH6225 is a square ISO indexable turning insert engineered for external and internal turning of stainless steels, offering a sharp yet stable cutting edge for medium machining and variable conditions.

• PVD-coated carbide for improved wear resistance
• Optimised for stainless steel turning
• 0.8 mm corner radius for robust edge life
• Square geometry with cylindrical hole and 4.76 mm thickness

Reliable, repeatable cutting performance for stainless steels

The insert’s PVD-coated carbide composition and the AH6225 grade deliver a balance between edge sharpness and toughness, aimed at rostfreie Stahl / stainless steel machining under changing conditions. The advanced coating reduces adhesion and improves resistance to built-up edge, which is particularly important when working with stainless materials that tend to work-harden. Featuring a double-sided chipbreaker, the geometry promotes stable chip formation and reduces vibration, resulting in more consistent surface finish and reduced tool changes. In practical terms, this means fewer stoppages and more predictable component quality during batch production.

Seamless integration into ISO turning systems for secure clamping

Compatibility with the toolholder is defined by geometry, clearance angle (0°), tolerance class, fastening method, size and thickness. The square SNMG geometry with a cylindrical hole enables positive clamping in standard ISO external holders or boring bars, while the 90° included angle suits facing and general turning operations. The insert is part of a system consisting of the ISO indexable plate, the appropriate external holder or boring bar, a shim/clamping set and replacement screws — a complete setup that simplifies inventory and reduces setup time. Clear specification of the plate thickness (4.76 mm) and plate size (12 mm) aids correct holder selection, avoiding indexing errors and maintaining cutting stability.

Durability, edge management and application guidance

The 0.8 mm corner radius offers a compromise between load-bearing capacity and surface finish: it increases notch resistance and extends edge life compared with finer radii while maintaining acceptable cutting forces for medium cuts. For finishing passes at lighter feeds, a smaller radius would be preferred, whereas the 0.8 mm radius is well suited to semi-finishing and general turning stages. The universal AH6225 grade is designed for mid-range parameters; selecting the appropriate chipbreaker and cutting data according to component rigidity and material condition ensures optimal results. Handling and indexing are straightforward thanks to the insert’s square form and symmetric chipbreaker: both sides can be used, doubling the effective tool life before disposal.

Contact Metav Werkzeuge for tailored application advice on Tungaloy turning inserts and guidance on feed and speed parameters; reach us at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: 6796313
• Manufacturer SKU: TUN6796313
• Product name: SNMG120408 AH6225 Tungaloy-Wendeplatte

Numbers / Core technical data

• Corner radius: 0.8 mm
• Plate thickness: 4.76 mm
• Plate size: 12 mm
• Included angle: 90°
• Clearance angle: 0°

Designs / Special features

• Material: carbide
• Coating: PVD-coated carbide
• Geometry: square plate
• Hole: with cylindrical hole
• Chipbreaker: double-sided
• Model series: ISO turning indexable inserts
• Application: turning (external and internal)

FAQ

What materials is this insert best suited for?
The SNMG120408 AH6225 is formulated as a universal grade for stainless steel machining and performs reliably across a range of ferritic and austenitic stainless alloys.

How does the 0.8 mm corner radius affect machining?
A 0.8 mm corner radius increases edge strength and resistance to notch wear, making the insert suitable for semi-finishing and general turning where a balance between finish and durability is required.

Is the insert reversible or single-use per edge?
The square geometry with a double-sided chipbreaker allows multiple indexings; the insert can be rotated to present fresh cutting edges until all usable sides are consumed.

What are the benefits of the PVD coating on this grade?
The PVD-coated carbide reduces adhesion and increases wear resistance, which helps to maintain edge integrity and minimise built-up edge when machining stainless steels.

Which holders are compatible with this insert?
Compatibility depends on form, clearance angle, tolerance class, fastening and size; the SNMG120408 fits standard ISO external holders and boring bars designed for SNMG plates.

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.