SCGT120408-MM4 WSM20S MM4 Wendeplatten - Walter Tools

Combining the Tiger·tec Silver coating with the WSM20S grade and an MM4 chipbreaker delivers reliable edge stability and controlled chips when machining stainless steels and heat‑resistant alloys; order directly via Metav Werkzeuge or ask consultants for tailored recommendations.

SCGT120408-MM4 WSM20S — turning and drilling indexable insert, Tiger·tec Silver, 7° relief (Walter Tools)

SCGT120408-MM4 WSM20S is a square 90° indexable insert designed for combined drilling, boring and turning tasks in stainless steel and heat‑resistant superalloys, offering stable cutting performance and consistent surface quality.

• Tiger·tec Silver coating for heat resistance
• Optimised MM4 chip control
• Suitable for stainless steel and superalloys
• Square 90° geometry, 0.8 mm corner radius

Proven performance for demanding materials

The WSM20S grade, within the Tiger·tec Silver series, is developed for machining stainless steel and heat‑resistant superalloys where thermal loading and material toughness challenge tool life. The combination of a coated cemented carbide substrate and a robust microstructure offers improved cutting-edge stability, which reduces the frequency of insert changes and supports higher productive throughput. Practical benefits include fewer unplanned tool exchanges and more predictable cycle times in batch production.

Geometry and chip control that improve process reliability

Square 90° form and a 0.8 mm corner radius provide a balance between strength and accessibility for shoulder turning and boring operations. The MM4 chipbreaker is tuned to produce short, controllable chips in tough workpiece materials; this lessens the risk of chip entanglement and enhances coolant access to the cutting zone. A 7° relief angle reduces rubbing on the flank, supporting consistent surface finish and minimising heat build‑up at the cutting edge.

Integration into the workshop and economic advantages

The insert is supplied in the SCGT family format for holders commonly used in combined drilling and turning toolheads; the standardised form enables straightforward interchangeability and simplifies inventory management. The tolerance class G and execution T support repeatable seating and stable clamping, translating into repeatable component quality and lower scrap rates. For operations aiming to improve overall equipment effectiveness, this insert contributes to longer tool life and a lower cost per component when compared to uncoated or softer grades.

Practical application recommendations and handling

When machining stainless steel or titanium alloys with this grade and geometry, moderate cutting speeds combined with stable feed rates are advantageous to maintain edge life; coolant application assists thermal control and chip evacuation. The insert’s coated surface supports intermittent higher temperatures, permitting short bursts of increased productivity when process conditions permit. For adaptation to specific machines, holders or finishing requirements, technical consultation is recommended to match speeds and feeds to the workpiece and machining strategy.

Contact Metav Werkzeuge for customised process recommendations and availability of Walter Tools Tiger·tec Silver inserts, and let our specialists advise on the optimal insert geometry for specific materials and machines.

Technical Data

• Article number: SCGT120408-MM4-WSM20S-WALTER
• Designation: SCGT120408-MM4 WSM20S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver
• Grade: WSM20S

Facts

• Size: 12 mm
• Corner radius: 0.8 mm
• Relief angle: 7°
• Thickness: 4 mm
• Tolerance class: G

Special features

• Coating: Tiger·tec Silver
• Chipbreaker: MM4
• Geometry: Square 90°
• Execution: T
• Material suitability: stainless steel (M), heat‑resistant superalloys / titanium (S)

FAQ

What materials is this insert suitable for?
The insert is suitable for stainless steel and heat‑resistant superalloys; the WSM20S grade and Tiger·tec Silver coating support secure chip formation and edge stability in these materials.

Can the SCGT120408-MM4 be used for both drilling and turning operations?
Yes, the SCGT120408-MM4 form is designed for combined drilling/boring and turning applications when used with compatible toolholders.

How does the MM4 chipbreaker affect machining?
The MM4 chipbreaker produces controllable, short chips in tough materials, improving chip evacuation and reducing the risk of chip re-cutting.

What advantage does the 0.8 mm corner radius offer?
A 0.8 mm corner radius increases edge strength for shoulder cuts while still allowing acceptable access for finishing passes, helping to balance tool life and surface quality.

Is the insert suitable for interrupted cuts or high thermal loads?
The Tiger·tec Silver coating and the WSM20S grade enhance thermal resistance and edge robustness, which helps under intermittent cutting and elevated temperatures; matching cutting parameters remains important.

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

Registered trademarks and trade names remain the property of their respective owners. Brand names and protected trademarks are mentioned for explanatory purposes only. There is no connection between our company and the named brands. The offered article is original, factory‑new goods of the manufacturer Walter Tools.