SCGT09T308-MM4 WSM20S MM4 Wendeplatten - Walter Tools

Take advantage of the WSM20S cutting grade together with the Tiger·tec Silver coating to achieve secure chip control and extended tool life in demanding turning tasks. The square 90° geometry with a 0.8 mm corner radius and 7° clearance provides stable cutting performance in stainless steel and heat‑resistant superalloys. Order via Metav Werkzeuge or ask our consultants for application-specific recommendations.

SCGT09T308-MM4 WSM20S – Square 90° turning insert, Tiger·tec Silver (Walter Tools)

The SCGT09T308-MM4 WSM20S is a square 90° indexable insert optimised for heavy-duty turning of stainless steel and high-temperature alloys in industrial machining environments.

• Tiger·tec Silver coating performance
• WSM20S grade for stainless steel & superalloys
• Square 90° geometry for stable indexing
• 7° clearance with 0.8 mm corner radius

Consistent productivity for difficult-to-cut materials

The combination of the WSM20S coated cemented‑carbide grade and the Tiger·tec Silver technology is designed to improve process stability when machining materials that tend to work‑harden or produce troublesome chips. The dedicated MM4 chipbreaker supports repeatable chip formation, reducing the risk of built‑up edge and unplanned interruptions. For production environments where cycle time and tool life directly affect output, this insert offers a measurable improvement in productivity and fewer tool changes.

Improved part quality and reliable cutting edge life

The square 90° form, paired with a 0.8 mm corner radius and 7° clearance, balances edge strength and surface finish. A larger corner radius increases edge robustness for interrupted cuts and roughing passes, while the clearance angle helps to avoid rubbing and heat build‑up. This results in more consistent dimensional accuracy and surface quality on turned components. The insert thickness designation T3 ensures adequate insert support in modern toolholders, contributing to predictable performance.

Practical application guidance and economic benefit

Designed for ISO material groups M and S, the insert is suitable for stainless steel (stainless steels) and heat‑resistant superalloys including titanium and nickel‑based materials. Using an indexable insert of this specification reduces tooling downtime because several cutting edges are available per insert, which lowers overall machining cost per part. For process optimisation, pairing this insert with appropriate cutting data and coolant strategy enhances its wear resistance and extends service intervals.

Contact Metav Werkzeuge for tailored cutting data and supply of Walter Tools inserts; our technical advisors are available at info@metav-werkzeuge.com or by telephone on +49 2822 7131930 to discuss the best setup for specific applications.

Technical Data

• SKU: SCGT09T308-MM4-WSM20S-WALTER
• Designation: SCGT09T308-MM4 WSM20S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Facts

• Clearance angle: 7°
• Corner radius: 0.8 mm
• Insert form: Square 90°
• Size designation: 09
• Tolerance class: G

Special features

• Grade: WSM20S
• Chipbreaker: MM4
• Thickness: T3
• Execution: T
• Material code: S / M
• Suitable for stainless steel and high‑temperature superalloys

FAQ

What materials is this insert suitable for?
This Walter Tools turning insert is designed for stainless steel and heat‑resistant superalloys; the WSM20S grade targets toughness and heat resistance in these groups.

How does the MM4 chipbreaker affect machining?
The MM4 chipbreaker on the SCGT09T308-MM4 promotes controlled chip formation, improving machining stability and reducing the risk of built‑up edge on challenging materials.

What does the 0.8 mm corner radius mean for part finish?
A 0.8 mm corner radius increases edge strength for roughing and interrupted cuts while maintaining a good surface finish when combined with appropriate feeds and speeds.

Is the insert compatible with standard square insert holders?
The square 90° geometry and T3 thickness of this indexable insert are compatible with standard toolholders designed for this insert shape and size; ensure correct clamping and seat contact.

How many cutting edges are available per insert?
The SCGT09T308-MM4 is a square indexable insert; each index provides a fresh cutting edge, allowing multiple repositions before replacement and reducing tooling costs.

Manufacturer: Walter Tools; Tübingen, Germany

Protected trademarks and trade names are the property of their respective owners. Brand names and protected trademarks are mentioned for explanation only. There is no affiliation between our company and the mentioned brands. The offered item is an original, brand‑new product from the manufacturer. The Walter Tools brand denotes established tool quality and is noted here for identification purposes.