CNMG120408-NFT WSM20S WSM20S Wendeplatten - Walter Tools

Take advantage of the combination of high process security, reliable edge stability and optimised chip control provided by the Tiger·tec Silver grade; the robust rhombic geometry and 0° negative rake support productive turning of stainless steels and heat‑resistant alloys. Order the insert directly via Metav Werkzeuge or consult the team for cutting data and application guidance.

CNMG120408-NFT WSM20S — Indexable turning insert, Tiger·tec Silver, Walter Tools

The CNMG120408-NFT WSM20S is an indexable turning insert engineered for demanding turning operations on stainless steels and heat‑resistant superalloys, offering a balance of thermal resistance and edge robustness in heavy cutting conditions.

• Tiger·tec Silver coated grade WSM20S
• Rhombic 80° geometry for stable cuts
• 0° negative rake for heavy cuts
• Optimised NFT chipbreaker for secure chips

Maximise metal removal with stable edges and consistent surface finish

The combination of the Tiger·tec Silver coating and the WSM20S coated carbide substrate delivers enhanced heat resistance and wear protection under high thermal loads, which translates into longer edge life and fewer insert changes during production. With the rhombic 80° form and 0° negative rake, the geometry supports higher depth of cut and steady engagement, reducing vibration and promoting a consistent surface finish. These technical attributes enable measurable productivity gains when working on stainless steels or other tough alloys, where controlled wear and thermal resilience are decisive for cycle time reduction.

Easy integration into production and predictable chip behaviour

Designed for practical use in turning toolholders compatible with CNMG inserts, the cutting geometry and the NFT chipbreaker ensure repeatable chip formation and evacuation, which simplifies process planning and coolant strategy. The moderate corner radius 0.8 and the insert dimensions (insert size 12, thickness code 04) provide a compromise between strength and detail in the cutting edge, making the grade suitable for both roughing and semi‑finishing passes. Production engineers benefit from predictable tool life and fewer interruptions, supporting leaner shift handovers and steadier output.

Application profile, material suitability and technical rationale

The grade is particularly intended for materials classified under ISO codes S and M — heat‑resistant superalloys/titanium and stainless steels. In these materials, poor heat conduction and strong work‑hardening demand a coated grade that maintains a stable cutting edge and resists crater wear; WSM20S meets these requirements via its coating architecture and substrate design. The rhombic 80° geometry offers a robust cutting edge for radial loads, while the 0° negative rake adds edge strength in interrupted or heavy cuts. Where a clear explanation helps: the chipbreaker geometry constrains chip curl and directs swarf away from the cutting zone, reducing the risk of re-cutting and enabling continuous operation at productive feed rates.

Contact Metav Werkzeuge for tailored cutting data and orders for Walter Tools inserts: info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: CNMG120408-NFT-WSM20S-WALTER
• Designation: CNMG120408-NFT WSM20S
• Product type: Indexable turning insert
• Manufacturer: Walter Tools
• Grade: WSM20S
• Series: Tiger·tec Silver
• Chipbreaker: NFT

Facts

• Geometry: Rhombic 80°
• Relief angle: 0° (negative)
• Corner radius: 0.8
• Insert size: 12
• Thickness: 04
• Tolerance class: M

Special features

• Coating technology: Tiger·tec Silver
• Substrate: coated carbide
• Material suitability: S / M
• Typical applications: stainless steels, heat‑resistant superalloys
• Robust edge for interrupted and heavy cuts
• Optimised chip control via NFT chipbreaker

FAQ

What materials is this insert suitable for?
The CNMG120408-NFT WSM20S is specified for ISO groups S and M, meaning it is suited to heat‑resistant superalloys/titanium and stainless steels; Walter Tools designed the WSM20S grade for thermal stability and secure chip formation in these challenging materials.

Can the insert be used for both roughing and finishing?
Yes; the combination of the rhombic 80° geometry and a corner radius 0.8 provides the strength required for roughing while still allowing controlled metal removal for semi‑finishing, depending on chosen feeds and depths of cut.

How does the NFT chipbreaker improve process reliability?
The NFT chipbreaker on this insert shapes and directs chips away from the cut, reducing the risk of re‑cutting and improving coolant penetration; the result is steadier machining conditions and fewer unscheduled interruptions with the Walter Tools grade.

Which toolholder clamping is recommended for CNMG inserts?
Standard toolholders compatible with CNMG format are appropriate; correct clamping and axial support are essential to exploit the 0° negative rake and the rhombic geometry for reliable cutting performance.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen

Protected trademarks and trade names are the property of their respective owners. Brand names and protected trade names are mentioned solely for explanatory purposes. There is no affiliation between our company and the named brands. The offered item is original, brand‑new goods from the manufacturer Walter Tools. The Walter AG (trading as Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik group.