CNMG120412-NRS WSM20S WSM20S Wendeplatten - Walter Tools

Take advantage of the combination of the Tiger·tec Silver coating and the WSM20S grade for stable chip formation and extended edge life when machining stainless steels and heat‑resistant superalloys; order directly via Metav Werkzeuge or consult our specialists for matching insert geometries and delivery options.

CNMG120412-NRS WSM20S turning insert by Walter Tools — coated carbide for stainless and superalloys

CNMG120412-NRS WSM20S is a rhombic, negative‑rake turning insert designed for demanding turning operations in heat‑resistant alloys and rostfreier Stahl (stainless steels)

• Tiger·tec Silver coating for high thermal resistance
• NRS optimised chipformer for stable chips
• Rhombic 80° form with 1.2 mm nose radius
• Negative 0° rake for robust cutting edge

High thermal stability for difficult materials

The combination of the Tiger·tec Silver coating and the WSM20S grade delivers enhanced thermal resistance and wear control during heavy cutting of stainless steels and superalloys. Coated carbide technology reduces diffusion and oxidation at the cutting edge, which supports stable chip formation and helps avoid built‑up edge. For production environments where consistent tool life and repeatable results matter, this grade is engineered to maintain cutting performance under elevated temperatures and interrupted cuts. The design therefore contributes to predictable cycle times and fewer tool changes, supporting efficient process planning.

Geometry and chip control that improve surface quality

The rhombic 80° insert form combined with a 1.2 mm nose radius produces a robust cutting edge that balances strength and surface finish. The NRS chipformer is optimised for controlled chip breaking when machining sticky or ductile materials, reducing the risk of long, tangled chips and improving machining security. The negative 0° rake increases edge robustness for tougher operations or when runout and rigidity are concerns. Together, these features enable efficient roughing passes while also permitting acceptable finishes with appropriate feeds and speeds.

Designed for process reliability and productivity

Specified tolerance class M and the insert’s graded construction ensure repeatable performance in automated turning cells and medium‑ to high‑volume production. The insert’s suitability for materials coded M (stainless steels) and S (heat‑resistant superalloys/titanium) gives machining planners flexibility across workpiece families, reducing tool inventory complexity. Using inserts with consistent chip control and thermal resistance leads to fewer interruptions, better surface consistency and an improved cost per component in series manufacturing. Walter Tools’ engineering focus on edge stability supports scalable, secure processes on modern CNC lathes.

For tailored advice on integrating Walter Tools Tiger·tec Silver inserts into existing toolholders and production lines, contact Metav Werkzeuge for technical consultation and prompt supply.

Technical Data

• Article number: CNMG120412-NRS-WSM20S-WALTER
• Name: CNMG120412-NRS WSM20S
• Manufacturer: Walter Tools
• Product type: Drehwendeschneidplatte

Measurements and core data

• Insert designation: CNMG120412-NRS WSM20S
• Series: Tiger·tec Silver
• Grade: WSM20S
• Inscribed circle / size: 12
• Shape: Rhombus 80°
• Nose radius: 1.2 mm
• Thickness: 04
• Rake angle: 0° (negative)
• Tolerance class: M

Design and special features

• Chipformer: NRS
• Coating: Tiger·tec Silver
• Material base: coated carbide
• Material suitability: stainless steels (M), superalloys / titanium (S)
• Application: heavy‑duty turning of difficult‑to‑machine materials
• Execution: G

FAQ

What materials is this insert intended for?
The CNMG120412-NRS WSM20S insert is specified for rostfreier Stahl (stainless steels) and heat‑resistant superalloys/titanium, corresponding to ISO groups M and S.

Is the chip control suitable for interrupted cuts?
Yes, the NRS chipformer together with the Tiger·tec Silver coating provides controlled chip formation and enhanced thermal resistance, making the insert well suited for interrupted and demanding cuts.

Which insert geometry ensures strength and surface finish?
The rhombic 80° form with a 1.2 mm nose radius offers a robust edge for heavy cuts while permitting good surface finish when combined with appropriate feeds.

Can this insert be used for roughing and finishing?
The negative‑rake geometry and NRS chipformer favour robust roughing and medium finishing applications; cutting data adjustment is recommended for final surface requirements.

Does the WSM20S grade offer predictable tool life?
WSM20S, in the Tiger·tec Silver family, is designed for stable edge life and consistent performance when machining stainless steels and superalloys, supporting predictable tool change intervals.

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

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