WCMT040204-RM4 WSM20S RM4 Wendeplatten - Walter Tools

Take advantage of the combination of high wear resistance, secure chip control and a geometry optimised for stainless and high-temperature alloys to keep machining stable and productive. Order genuine Walter Tools inserts for consistent results via Metav Werkzeuge or consult the team for material-specific advice.

WCMT040204-RM4 WSM20S Trigon 80° indexable insert — Tiger·tec Silver, for stainless steel and superalloys | Walter Tools

WCMT040204-RM4 WSM20S is a Trigon 80° indexable insert designed for demanding turning and boring operations in stainless steels and heat-resistant superalloys

• Tiger·tec Silver coated grade WSM20S
• Trigon 80° insert form
• 7° clearance angle for secure cutting
• RM4 chipbreaker for controlled chips

Engineered for high-temperature, hard-to-machine materials

The insert is based on the WSM20S grade within the Tiger·tec Silver family, a coated carbide technology engineered for thermal stability and wear resistance. This composition supports machining of stainless steel (ISO group M) and superalloys/titanium (ISO group S), materials that generate heat and can cause built-up edge. The coating reduces friction and improves heat management, which extends tool life and reduces unexpected downtime. As a result, the insert delivers predictable tool wear and consistent component quality in production environments where process reliability matters.

Geometry that balances strength and precision

The Trigon 80° form provides a strong cutting edge while allowing access to a wide range of turning and boring profiles. The 0.4 mm corner radius smooths transitions and supports edge stability, reducing chatter and improving surface finish on long or interrupted cuts. The 7° clearance angle ensures that the cutting edge engages material efficiently without rubbing, helping to maintain dimensional accuracy. The RM4 chipbreaker is optimised for medium-to-heavy feeds and supports stable chip formation, which simplifies chip handling and protects both the workpiece and the toolholder.

Practical benefits in daily machining

Using a coated grade like WSM20S means fewer insert changes and more predictable shift planning: the combination of coating, substrate and chipbreaker reduces the frequency of interventions. For production teams, this translates into higher machine uptime and a lower cost per part. The insert's form and coating also help to achieve consistent surface quality, which is particularly helpful when subsequent processes such as heat treatment or assembly demand tight tolerances and good finish.

Simple selection and integration into existing processes

The insert is supplied in the common ISO designation format and fits standard toolholders designed for Trigon 80° geometry, easing inventory management. Operators familiar with indexable turning inserts will recognise the handling and clamping procedures; the coated carbide substrate and specific RM4 chip control mean cutting data can often be increased compared with uncoated grades when cooling and fixturing are adequate. For applications with severe work-hardening or interrupted cuts, pairing this insert with appropriate cutting parameters yields the best balance of life and part quality.

Contact Metav Werkzeuge for material-specific recommendations and to obtain original Walter Tools Tiger·tec Silver inserts — eMail: info@metav-werkzeuge.com | Tel: +49 2822 7131930

Technical data

• SKU: WCMT040204-RM4-WSM20S-WALTER
• Article designation: WCMT040204-RM4 WSM20S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver
• Type: Trigon 80° indexable insert

Key numbers

• Clearance angle: 7°
• Corner radius: 0.4 mm
• Plate form: Trigon 80°
• Plate size: 04
• Plate thickness: 02

Special features

• Grade: WSM20S
• Chipbreaker: RM4
• Coating: Tiger·tec Silver (coated carbide)
• Material applicability: S / M (superalloys/titanium; stainless steel)
• Tolerance class: M

FAQ

Which materials are best machined with this insert?
The WCMT040204-RM4 WSM20S insert is specified for ISO groups M and S, making it suitable for stainless steel and heat‑resistant superalloys or titanium where thermal stability and edge life are critical.

What does the RM4 chipbreaker provide?
The RM4 chipbreaker promotes controlled chip segmentation and evacuation at moderate to heavy feed rates, reducing entanglement and improving overall process stability with the WSM20S grade.

Why choose a Trigon 80° form for turning tasks?
The Trigon 80° geometry offers a robust cutting edge and good access to shoulders and profiles; it balances strength and reach, which is beneficial for interrupted cuts and general turning with the coated grade.

How does the Tiger·tec Silver coating improve performance?
Tiger·tec Silver reduces friction and improves heat resistance at the cutting edge, enabling longer tool life and more consistent wear behaviour compared with uncoated substrates in demanding materials.

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

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