CNMG120408-FM5 WSM20S FM5 Wendeplatten - Walter Tools

Taking advantage of the Tiger·tec Silver coating and the WSM20S grade, this indexable insert delivers stable edge performance and reliable chip control when machining stainless steels and heat‑resistant superalloys; order or request application advice via Metav Werkzeuge for smooth integration into production.

CNMG120408-FM5 WSM20S indexable turning insert, Tiger·tec Silver, for stainless steels — Walter Tools

The CNMG120408-FM5 WSM20S is a rhombic 80° indexable turning insert with a 0° negative rake and an FM5 chipbreaker, designed for demanding machining of stainless steels and heat‑resistant superalloys.

Tiger·tec Silver coating for high thermal resistance
Optimised FM5 chipbreaker for stable chip control
Rhombic 80° shape with 0.8 mm corner radius
Suitable for stainless steels and superalloys

Consistent cutting performance for difficult materials

The combination of the WSM20S grade and Tiger·tec Silver coating ensures consistent cutting in materials that tend to work‑harden and generate high temperatures. The coated cemented carbide substrate offers enhanced resistance to the thermal loads typical of machining stainless steels and superalloys, which results in more predictable tool life and fewer interrupted production cycles. By prioritising thermal stability and edge retention, this insert reduces the frequency of tool changes and supports a continuous machining process, thereby improving overall throughput.

Reliable chip control and edge stability for smoother operations

Equipped with the FM5 chipbreaker, the insert delivers controlled chip formation across moderate to heavy cutting conditions. The chipbreaker geometry is optimised to guide chips away from the cutting zone and to prevent chip entanglement, which lowers the risk of surface damage and tool breakage. Combined with the 0.8 mm corner radius, this geometry provides a beneficial balance between strength and finishing capability, permitting stable feeds while still achieving acceptable surface quality on components made from tough alloys.

Geometry and handling that simplify programming and setup

The rhombic 80° shape and 0° negative rake make this insert adaptable for common turning setups where rigidity and clearance are required. Negative rake inserts like this one are especially useful in interrupted cuts and tougher sections of a workpiece because the geometry transfers cutting forces into the toolholder more securely. The insert’s nominal dimensions and designation follow established ISO conventions, making it straightforward to match with compatible toolholders and to reproduce cutting parameters across different machines and shifts.

Productivity gains and predictable tool life

Applying this grade in the appropriate cutting window typically improves process stability and can reduce overall machining costs through fewer tool interventions. The WSM20S grade focuses on secure chip formation and a stable cutting edge, which together translate to longer effective service life under demanding conditions. When combined with suitable cutting data and coolant practices, the insert supports repeatable results and consistent surface finish—qualities that are vital for batch production and precision components in regulated sectors.

Contact Metav Werkzeuge for tailored application advice and to secure Walter Tools CNMG120408-FM5 WSM20S inserts with Tiger·tec Silver for stainless steels and superalloys — eMail info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: CNMG120408-FM5-WSM20S-WALTER
• Type: indexable turning insert (drehwendeschneidplatte)
• Designation: CNMG120408-FM5 WSM20S
• Series: Tiger·tec Silver
• Grade: WSM20S
• Manufacturer: Walter Tools

Facts

• Tolerance class: M
• Relief angle: 0° (negative)
• Corner radius: 0.8 mm
• Shape: Rhombic 80°
• Inscribed circle/size: 12
• Thickness code: 04
• Chipbreaker: FM5

Special features

• Coating: Tiger·tec Silver
• Material suitability: stainless steels (M), heat‑resistant superalloys and titanium (S)
• Application focus: tough, heat‑generating materials and demanding turning operations
• Execution/design: G

FAQ

What materials is this insert optimised for?
The CNMG120408-FM5 WSM20S insert is optimised for stainless steels and heat‑resistant superalloys, using the Tiger·tec Silver coating and the FM5 chipbreaker to manage thermal load and chip formation.

How does the FM5 chipbreaker benefit production?
The FM5 chipbreaker on this rhombic insert creates controlled chip flow and reduces the risk of chip accumulation, which helps to maintain surface quality and reduces unplanned stops in the machining process.

Is the geometry suitable for interrupted cuts?
Yes, the 0° negative rake and robust corner radius make the insert suitable for interrupted cuts and sections where higher cutting forces occur, providing mechanical stability at the cutting edge.

Can this insert be used with standard ISO toolholders?
The ISO designation CNMG120408-FM5 WSM20S follows established sizing conventions, so it can be matched with compatible ISO toolholders; verify holder compatibility for the rhombic 80° form.

What practical advantage does the Tiger·tec Silver coating offer?
Tiger·tec Silver improves thermal resistance and reduces wear in high‑temperature cutting, resulting in more consistent tool life when machining materials that conduct heat poorly.

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

Protected trademarks and trade names remain the property of their respective owners. Brand names and protected designations are mentioned for explanatory purposes only. There is no connection between our company and the brands named. The offered item is an original, brand‑new product of the manufacturer (Walter Tools).