CNMG120404-NFT WSM20S WSM20S Wendeplatten - Walter Tools

High-performance indexable insert combining Tiger‑tec Silver coating and the WSM20S grade for secure machining of stainless steel and heat‑resistant alloys; the geometry and chipbreaker support stable cutting and predictable chip flow. The insert features a 0° negative relief and a 0.4 mm corner radius for robust edge life. Order the CNMG120404‑NFT WSM20S directly via Metav Werkzeuge or ask our consultants if needed.

CNMG120404-NFT WSM20S – Rhombic 80° indexable insert with Tiger‑tec Silver, Walter Tools

CNMG120404-NFT WSM20S is an indexable turning insert optimised for demanding applications on stainless steel and superalloys, combining a heat‑resistant coating and a stable chip control geometry.

• Tiger‑tec Silver coating for heat resistance
• WSM20S grade for stable cutting edges
• Rhombic 80° geometry for versatile turning
• NFT chipbreaker for predictable chip control

Consistent cutting performance on stainless steel and superalloys

The combination of the WSM20S grade and Tiger‑tec Silver technology provides enhanced thermal stability and wear resistance during tough turning operations. Designed for materials classified as ISO group M (stainless steels) and S (superalloys and titanium), the grade supports secure chip formation and reduces the risk of built‑up edge under elevated cutting temperatures. For production environments where material consistency and repeatability matter, this insert reduces variability in cutting forces and contributes to a more predictable machining process, which in turn supports higher first‑pass yields and fewer rework cycles.

Geometry and chip control that maintain uptime

The rhombic 80° geometry paired with a 0° negative relief offers a balance between strength at the cutting edge and accessibility for various turning tasks. The 0.4 mm corner radius provides a robust edge for interrupted cuts while maintaining acceptable surface finish on the workpiece. The NFT chipbreaker is tuned to promote consistent chip segmentation when machining sticky or heat‑sensitive alloys, lowering the likelihood of long stringy chips that can foul the tool or workpiece. These characteristics translate into less unscheduled downtime and more reliable tool life, supporting lean manufacturing goals.

Process benefits and workshop integration

As an ISO‑standard CNMG insert, the design integrates seamlessly with conventional toolholders and established turning setups, simplifying inventory and tool planning. The coated cemented carbide construction offers a balance of toughness and wear resistance, making the insert suitable for both roughing and finishing passes where edge stability and predictable wear behaviour are priorities. When implemented into a controlled cutting strategy, the insert contributes to reduced cycle times and improved overall equipment productivity, offering measurable advantages for batch production and maintenance of consistent surface quality.

Select Walter Tools' Tiger‑tec Silver WSM20S for demanding stainless steel turning—contact Metav Werkzeuge at info@metav-werkzeuge.com or +49 2822 7131930 for application advice and rapid supply.

Technical data

• Article number: CNMG120404-NFT-WSM20S-WALTER
• Product type: Drehwendeschneidplatte
• Manufacturer: Walter Tools
• WPL designation: CNMG120404-NFT WSM20S
• Series: Tiger-tec Silver
• Grade/sort: WSM20S

Core specifications

• Corner radius: 0.4 mm
• Clearance angle: 0° (negative)
• Plate form: Rhombus 80°
• Plate size: 12 mm
• Plate thickness: 04
• Tolerance class: M

Design and material features

• Chipbreaker: NFT
• Coating/technology: Tiger·tec Silver (coated cemented carbide)
• Material groups: S / M
• Suitable for stainless steel (ISO group M): yes
• Suitable for superalloys/titanium (ISO group S): yes
• ISO designation (without grade): CNMG120404-NFT

FAQ

Which materials is this insert suitable for?
The CNMG120404‑NFT WSM20S is suitable for stainless steel (ISO group M) and for heat‑resistant superalloys/titanium (ISO group S), thanks to the Tiger‑tec Silver coating and the WSM20S grade.

What benefits does the Tiger‑tec Silver technology provide?
Tiger‑tec Silver on the WSM20S grade enhances thermal resistance and wear properties, helping the insert maintain a stable cutting edge under high temperatures and supporting consistent chip control.

How does the NFT chipbreaker influence machining?
The NFT chipbreaker produces segmented, controllable chips during turning, which reduces the risk of long, entangling chips and supports uninterrupted production when machining difficult‑to‑cut alloys with the CNMG120404‑NFT.

What does the 0.4 mm corner radius mean for surface finish and edge life?
A 0.4 mm corner radius provides a compromise between edge toughness and surface finish: it increases edge strength for interrupted cuts while still permitting acceptable surface quality on finishing passes.

Is this insert compatible with standard CNMG toolholders?
Yes, the CNMG120404‑NFT WSM20S follows the ISO CNMG designation and is intended for use in standard CNMG‑compatible turning toolholders.

Walter Tools (Walter AG): The Walter AG (marketed 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. Protected trademarks and product names remain the property of their respective owners; their mention serves informational purposes only and does not imply any affiliation.