CPMT09T304-MM4 WSM20S MM4 Wendeplatten - Walter Tools

Take advantage of the combination of the WSM20S grade and the Tiger·tec Silver series for secure chip formation and extended edge life in turning operations; order the insert directly via Metav Werkzeuge or consult our specialists for process-adapted recommendations.

CPMT09T304-MM4 WSM20S indexable turning insert by Walter Tools — Tiger·tec Silver, for rostfreier Stahl and superalloys

CPMT09T304-MM4 WSM20S is an indexable turning insert designed for demanding turning tasks on rostfreier Stahl and heat-resistant alloys, featuring a robust chipbreaker and a geometry optimised for stable cutting performance.

• Tiger·tec Silver for improved edge life
• WSM20S grade for rostfreier Stahl and superalloys
• MM4 chipbreaker for consistent chip control
• 11° relief angle and 0.4 mm corner radius

Reliable cutting in difficult-to-machine materials

The Tiger·tec Silver coating combined with the WSM20S grade provides a balance of thermal resistance and edge stability that reduces the risk of built-up edge when machining rostfreier Stahl and nickel-based alloys. The insert’s coated carbide substrate supports continuous cutting at elevated temperatures, which translates into fewer tool changes and more predictable production cycles. By stabilising chip formation with the MM4 chipbreaker, the insert lowers the likelihood of irregular chips that can damage workpiece surfaces or disrupt automated processes. This technical setup addresses throughput and process reliability — key criteria for efficient turning operations in series production.

Geometry that supports surface quality and tool life

The rhombic 80° form and the 0.4 mm corner radius are chosen to combine edge strength with acceptable surface finish, while the 11° relief angle reduces rubbing at the flank face. These geometric parameters help distribute cutting forces and lower thermal loads on the cutting edge, leading to extended service intervals. For users requiring consistent part quality, the combination of form, clearance and corner rounding provides a tangible reduction in rework and inspection effort. The insert’s tolerance class M further supports reproducible clamping and indexation in suitable toolholders, aiding repeatability across batches.

Practical integration and application guidance

Designed for standard indexable turning workflows, the plate size designation CPMT09 indicates suitability for toolholders accepting 09-format inserts; the designation also implies the plate thickness T3 and the MM4 chip control. The WSM20S sort is particularly suited where machining includes both rostfreier Stahl (ISO group M) and heat‑resistant superalloys or titanium (ISO group S), offering a pragmatic choice for mixed production shops. Operators benefit from a reduced number of grade swaps and simplified inventory: one coated grade covers a broad range of demanding materials while delivering stable machining and repeatable results.

Contact Metav Werkzeuge for tailored feed and speed recommendations and to secure consistent supply of Walter Tools Tiger·tec Silver inserts

Technical Data

• SKU: CPMT09T304-MM4-WSM20S-WALTER
• Article designation: CPMT09T304-MM4 WSM20S
• Manufacturer: Walter Tools
• Product type: Indexable turning insert

Key Measurements

• Corner radius: 0.4 mm
• Relief angle: 11°
• Plate size: 09
• Plate thickness: T3
• Shape: Rhombus 80°
• Tolerance class: M

Materials & Features

• Series: Tiger·tec Silver
• Grade: WSM20S
• Chipbreaker: MM4
• Applicable material groups: S / M
• Primary applications: rostfreier Stahl, heat‑resistant superalloys and titanium
• Execution: T (single-sided thickness specification)

FAQ

Is this insert suitable for machining rostfreier Stahl?
Yes. The WSM20S grade in the CPMT09T304-MM4 insert is formulated for machining rostfreier Stahl (ISO group M) and provides stable chip formation and improved edge life in such applications.

What does the MM4 chipbreaker do?
The MM4 chipbreaker on the CPMT09T304-MM4 WSM20S insert controls chip shape and evacuation, helping to maintain consistent cutting conditions and protecting the workpiece surface during turning.

Which workpiece materials are covered by the WSM20S grade?
WSM20S is intended for rostfreier Stahl and heat‑resistant superalloys, with the coating and carbide combination optimised for thermal resistance and cutting edge stability in these materials.

How do the 0.4 mm corner radius and 11° relief angle affect machining?
The 0.4 mm corner radius increases edge strength for interrupted cuts and roughing, while the 11° relief angle reduces flank contact to improve surface finish and reduce heat buildup.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen, Germany; info@walter-tools.com

Protected trademarks and product names are the property of their respective owners. Brand names and trademarks are mentioned for explanatory purposes only. There is no affiliation between our company and the named brands. The offered item is an original, factory‑new product from Walter Tools.