CPMT09T308-MM4 WSM20S MM4 Wendeplatten - Walter Tools

Benefit from consistent performance in stainless steels and heat-resistant superalloys thanks to the Tiger·tec Silver WSM20S grade and the MM4 chipbreaker; combine long tool life with reliable chip control and order the CPMT09T308-MM4 via Metav Werkzeuge or consult the specialists for application-specific advice.

CPMT09T308-MM4 WSM20S turning indexable insert — Tiger·tec Silver grade, MM4 chipbreaker (Walter Tools)

A CPMT09T308-MM4 WSM20S indexable insert engineered for secure machining of stainless steels and heat-resistant superalloys in demanding turning operations.

• Tiger·tec Silver coating, WSM20S grade
• Optimised chip control with MM4 breaker
• Rhombic 80° form with 0.8 mm corner radius
• Suited for stainless steels and superalloys

Reliable material compatibility and grade advantages

The coated carbide WSM20S in the Tiger·tec Silver series is formulated for high demands when machining stainless steels and superalloys. This cutting grade emphasises thermal stability and edge integrity, which reduces the risk of built-up edge and unexpected tool failure. As a consequence, process stability is improved and machining cycles can be scheduled with greater confidence. The material behaviour of the workpiece is considered explicitly: these alloys tend to retain heat and strain the cutting edge, so the grade is optimised to maintain a sharp, stable edge under elevated temperatures.

Controlled chip formation and surface quality

The MM4 chipbreaker combined with the rhombic 80° geometry provides consistent chip control and predictable breakage, supporting uninterrupted turning cycles. A 0.8 mm corner radius and 11° relief angle balance robustness and finish capability: the radius supports higher metal removal rates while still enabling fine surface quality when required. The insert’s dimensional stability is supported by tolerance class M, which ensures repeatable seating and concentricity in the holder; this is particularly important when a reproducible surface finish and dimensional accuracy are needed across production batches.

Practical application benefits and economical handling

With a plate size of 09 and T3 thickness, the insert is compatible with standard CPMT tool systems and is straightforward to index and replace, reducing machine downtime. The coated carbide construction from the Tiger·tec Silver family delivers a combination of wear resistance and shock tolerance, making the insert suitable for interrupted cuts and mixed-cycle production. Maintenance is simplified because inserts can be rotated or exchanged quickly; overall tool costs are lowered by extending edge life and reducing scrap through stable cutting performance. For newcomers: an indexable insert fixes into a corresponding toolholder and is secured by clamp or screw — this enables fast replacement without regrinding.

Discuss tool selection and application parameters with Metav Werkzeuge to ensure optimal performance for stainless steel or superalloy turning; contact info@metav-werkzeuge.com or call +49 2822 7131930 for tailored advice and availability

Technical Data

• Article number: CPMT09T308-MM4-WSM20S-WALTER
• Manufacturer: Walter Tools

Numbers / Core technical data

• Plate size: 09
• Corner radius: 0.8 mm
• Relief angle: 11°
• Thickness: T3
• Tolerance class: M

Special features / Versions

• Series: Tiger·tec Silver
• Grade: WSM20S (coated carbide)
• Chipbreaker: MM4
• Plate form: Rhombic 80° (CPMT geometry)
• Suitable for: stainless steels (ISO M), heat‑resistant superalloys (ISO S)

FAQ

What materials is this insert intended for?
The CPMT09T308-MM4 WSM20S insert is designed for stainless steels (ISO group M) and heat‑resistant superalloys (ISO group S), offering thermal stability and edge strength for these demanding materials.

What does WSM20S and Tiger·tec Silver signify?
WSM20S is the Walter Tools grade within the Tiger·tec Silver coating technology; it denotes a coated carbide engineered for improved wear resistance and cutting‑edge stability under elevated temperatures.

How does the MM4 chipbreaker affect machining?
The MM4 breaker ensures predictable chip formation and efficient evacuation, which helps to avoid entangling chips and contributes to consistent surface finish and extended tool life during turning.

Which operations are best suited to the CPMT09T308-MM4?
Its 0.8 mm corner radius and rhombic 80° geometry make the insert versatile for mixed operations: it supports robust roughing and can deliver fine finishes with appropriate cutting parameters and stable machine setup.

How does tolerance class M influence performance?
Tolerance class M provides reproducible seating accuracy in toolholders, which is important for maintaining concentricity and predictable cutting forces across serial production.

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