SCMT120408-FM4 WSM20S WSM20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and an optimised FM4 chipbreaker for reliable machining of demanding materials; the result is improved process stability and longer tool life. Order the SCMT120408-FM4 WSM20S turning insert directly via Metav Werkzeuge or ask the consultants for tailored application advice.

SCMT120408-FM4 WSM20S turning insert — Tiger·tec Silver for rostfreier Stahl and superalloys (Walter Tools)

The SCMT120408-FM4 WSM20S is a square turning insert engineered to provide secure chip control and stable cutting performance when machining rostfreier Stahl and heat‑resistant superalloys in demanding turning operations.

• Tiger·tec Silver coating for thermal stability
• Optimised FM4 chipbreaker for secure chip control
• Square 90° geometry with 0.8 mm corner radius

Consistent cutting performance for demanding materials

The Tiger·tec Silver coating and the WSM20S grade combine to deliver higher thermal resistance and a durable cutting edge, which reduces flank wear during interrupted cuts and heavy engagement. This turning insert is specifically adapted to the machining challenges of rostfreier Stahl (ISO group M) and superalloys (ISO group S), where poor heat conduction and built‑up edge formation are common. The result is improved process stability and a more predictable tool life, helping to reduce unplanned downtime and maintain consistent part quality.

Precise geometry for surface quality and repeatability

A square 90° insert form with a 0.8 mm corner radius balances strength and finish capability: the corner supports robust cutting under high loads, while the radius helps produce a controlled surface texture. The 7° clearance angle reduces rubbing on the clearance face, lowering cutting temperatures and enabling a more reliable engagement for typical turning operations. For workshops that prioritise repeatable results, this geometry aids in achieving close tolerances and consistent surface finishes on each workpiece.

Efficient chip control and tool management

The FM4 chipbreaker is optimised for the material class and the insert geometry, promoting short, controllable chips even under tough cutting conditions. This reduces the risk of chip entanglement and protects workpiece surfaces and machine tool components. With its stable edge and coating technology, the insert supports longer intervals between indexings, simplifying tool management and increasing productive cutting time on lathes and turning centres.

Application scenarios and operator benefits

Designed for use in production turning of components from rostfreier Stahl and heat‑resistant alloys, the insert is suited to both continuous and interrupted cuts where thermal and mechanical loads are high. Operators benefit from fewer quality rejects and more predictable regrinding or replacement schedules. For jobshops and OEMs aiming to increase throughput while maintaining finish requirements, this grade offers a good balance of durability and process reliability.

For high‑performance turning of rostfreier Stahl and superalloys with Walter Tools’ Tiger·tec Silver technology, contact Metav Werkzeuge for application support and direct supply—phone +49 2822 7131930 or email info@metav-werkzeuge.com

Technical data

• SKU: SCMT120408-FM4-WSM20S-WALTER
• Article: SCMT120408-FM4 WSM20S
• Type: turning insert
• Brand: Walter Tools
• Series: Tiger-tec Silver

Core specifications

• Shape: Square 90°
• Corner radius: 0.8 mm
• Clearance angle: 7°
• Size: 12
• Thickness code: 04
• Tolerance class: M

Materials & features

• Material suitability: S / M (superalloys, rostfreier Stahl)
• Chipbreaker: FM4
• Execution: T
• Range designation: WSM20S
• ISO designation: SCMT120408-FM4 WSM20S

FAQ

What materials is this insert best suited for?
The SCMT120408-FM4 WSM20S insert is intended for rostfreier Stahl (ISO group M) and heat‑resistant superalloys (ISO group S), offering thermal stability and edge strength for these difficult‑to‑machine materials.

How does the Tiger·tec Silver coating improve performance?
Tiger·tec Silver on the SCMT120408-FM4 WSM20S increases heat resistance and reduces wear, which leads to a more stable cutting edge and extended tool life in high‑temperature cutting conditions.

What chip form can be expected with the FM4 chipbreaker?
The FM4 chipbreaker on this turning insert produces short, manageable chips across the recommended material groups, improving safety and reducing the need for additional chip handling measures.

Is the insert suitable for interrupted cuts?
Yes, the geometry and the WSM20S grade of the SCMT120408-FM4 WSM20S are designed to withstand the mechanical shocks of interrupted turning while maintaining cutting edge integrity.

What is the significance of the 0.8 mm corner radius?
A 0.8 mm corner radius provides a compromise between edge strength and surface finish, helping to distribute cutting forces and maintain dimensional stability without sacrificing the quality of the machined surface.

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

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