CNMG120408-MM5 WSM20S Wendeplatten - Walter Tools

Take advantage of high process security, stable chip formation and robust edge life to reduce downtime and increase throughput. The combination of Tiger·tec Silver coating and the WSM20S grade ensures reliable performance in demanding applications; order directly via Metav Werkzeuge or consult the technical team for application-specific advice.

CNMG120408-MM5 WSM20S Rhombic 80° turning insert — Tiger·tec Silver for rostfreier Stahl and high‑temperature alloys (Walter Tools)

CNMG120408-MM5 WSM20S is a negative‑rake, rhombic‑80° indexable turning insert optimised for demanding materials and stable chip control

• Tiger·tec Silver coating for process security
• Suited to rostfreier Stahl and heat‑resistant alloys
• Rhombic 80° CNMG geometry for versatile turning
• 0.8 mm corner radius with MM5 chipformer

Stable chip formation and consistent edge life for higher productivity

The coated indexable insert delivers repeatable cutting performance thanks to the Tiger·tec Silver coating and the WSM20S grade. These features improve thermal resistance and wear behaviour, which leads to more predictable tool life and fewer unscheduled tool changes. Stable chip formation reduces the risk of built‑up edge and improves surface integrity on subsequent passes. For production environments where uptime and consistency are priorities, the insert contributes directly to process reliability and reduced unit costs.

Designed for rostfreier Stahl and high‑temperature alloys — explained

The cutting material classification S / M indicates suitability for both heat‑resistant superalloys/titanium and rostfreier Stahl. Machining these groups places heavy thermal and mechanical loads on the cutting edge; the WSM20S grade is formulated to withstand such conditions. In practical terms, this means improved resistance to thermal softening and better retention of a sharp edge during interrupted or continuous cuts, which helps maintain dimensional accuracy and surface finish when working with difficult‑to‑machine components.

Geometry and chip control that support versatile turning operations

The rhombic 80° CNMG geometry provides a balanced approach between strength and accessibility, allowing effective external turning and light profiling. The MM5 chipformer plus a 0.8 mm corner radius supports secure chip breaking and reduces vibration in medium cuts. A negative rake with 0° free angle enhances edge robustness under tougher cutting conditions. These geometric choices translate into operational benefits: fewer insert changes, steady cutting forces and reliable performance across a range of cutting parameters.

Practical advantages at the machine and on the shop floor

Using this turning insert can reduce cycle times and rework: coating and grade reduce flank wear while chip control helps keep the work area cleaner, lowering downstream handling time. The insert’s tolerance class M and consistent lot characteristics support interchangeability and reproducible results across batches, simplifying tool management. When combined with a systematic cutting data approach and appropriate clamping, the insert supports both single‑piece and batch production with predictable outcomes.

Contact Metav Werkzeuge for tailored recommendations on Walter Tools Tiger·tec Silver inserts and compatibility with specific machines and workpiece materials — eMail: info@metav-werkzeuge.com, Tel: +49 2822 7131930

Technical data

• SKU: CNMG120408-MM5-WSM20S-WALTER
• Description: Drehwendeschneidplatte CNMG120408-MM5 WSM20S Walter Tools
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver
• Grade: WSM20S
• Chipformer: MM5
• Execution: G
• Tolerance class: M

Numbers / Core technical data

• Size: 12
• Thickness: 04
• Corner radius: 0.8 mm
• Free angle: 0° (negative)
• Plate form: Rhombus 80°
• Edge designation: CNMG120408-MM5

Special features / Materials & functions

• Coating: Tiger·tec Silver
• Grade type: coated cemented carbide
• Suitable for: rostfreier Stahl (M)
• Suitable for: heat‑resistant superalloys and titanium (S)
• Chip control: MM5
• Series description: WSM20S — optimised for heavy‑duty and high‑temperature applications

FAQ

Which materials are best suited for this insert?
The CNMG120408‑MM5 WSM20S insert is specified for rostfreier Stahl and heat‑resistant superalloys/titanium; the WSM20S grade and Tiger·tec Silver coating target the thermal and mechanical demands of these groups.

What does the MM5 chipformer provide?
The MM5 chipformer enables reliable chip breaking in medium cutting conditions, helping to maintain a stable process and reduce the risk of chip entanglement during operations with the CNMG geometry.

Can the insert be used for interrupted cuts?
Yes — the negative‑rake design and robust grade deliver enhanced edge strength, making the insert suitable for interrupted and mixed turning tasks where shock resistance is required.

How does the Tiger·tec Silver coating affect tool life?
The Tiger·tec Silver coating increases thermal stability and wear resistance, which typically leads to longer tool life and more consistent cutting performance under elevated temperatures.

Is the corner radius of 0.8 mm suitable for finishing passes?
A 0.8 mm corner radius offers a compromise between strength and finish; it is appropriate for light to medium finishing where improved edge life is desired without sacrificing surface quality.

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

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