TNMG220408-MK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the Tiger‑tec Silver wear resistance together with the MK5 chipbreaker for stable, productive cast‑iron machining; the combination delivers longer tool life and consistent surface finish. Order directly via Metav Werkzeuge or consult their specialists for toolholder matching and application advice.

TNMG220408-MK5 WKK20S — Turning indexable insert, Tiger‑tec Silver for cast iron — Walter Tools

The TNMG220408-MK5 WKK20S is a robust turning insert designed for productive machining of cast iron, offering a coated‑carbide grade optimised for abrasive materials.

• Tiger‑tec Silver coating for long tool life
• Optimised for cast iron machining (ISO group K)
• MK5 chipbreaker for controlled short chips
• Triangle 60° form with 0.8 mm radius

Durable coating that extends tool life in abrasive jobs

The Tiger‑tec Silver technology and the WKK20S coated grade are engineered to resist the abrasive wear typical of cast‑iron turning. As a result, the insert shows stable cutting performance and extended lifetime compared with standard grades, which reduces tool changes and keeps cycle times predictable. The coated cemented‑carbide construction ensures reliable edge security under fluctuating cutting conditions while maintaining surface quality on the workpiece.

Geometry engineered for secure cutting and chip control

The combination of the MK5 chipbreaker, triangle 60° form and corner radius 0.8 mm provides consistent chip formation and evacuation when processing short, brittle chips from cast iron. The 0° (negative) rake increases edge robustness for interrupted cuts and heavy cross‑sections, protecting the cutting edge from impact and flank wear. This geometry supports uninterrupted production by reducing the risk of built‑up edge and tool failure.

Designed for productive series turning and easy integration

With an inscribed circle of 22 mm and a thickness corresponding to the 04 designation, the insert fits common turning toolholders and indexable tool systems, delivering quick regrip and repeatable positioning. Tolerance class M provides consistent dimensional accuracy across batches, which helps maintain predictable part tolerances in series manufacture. The insert’s combination of dimensions and design simplifies tool inventory and supports efficient tool‑change procedures.

Application guidance for process reliability

The insert is specifically matched to ISO group K materials and is a practical choice where abrasive wear is the dominant challenge. In mixed production environments the coated grade gives a good balance between wear resistance and toughness, making it suitable for both continuous and heavier interrupted cuts. For optimal results, pair the insert with a suitable negative‑rake holder and set cutting parameters according to the component’s hardness and chipbreaking needs; the Walter Tools TNMG220408‑MK5 WKK20S demonstrates its strengths under those conditions.

For robust cast‑iron turning with Tiger‑tec Silver, contact Metav Werkzeuge to select the right Walter Tools TNMG220408‑MK5 WKK20S insert and compatible toolholder for the application.

Technical data

• Article number: TNMG220408-MK5-WKK20S-WALTER
• Designation: TNMG220408-MK5 WKK20S
• Product type: Turning indexable insert
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver
• Grade: WKK20S

Facts

• Inscribed circle: 22 mm
• Thickness: 4.0 mm
• Corner radius: 0.8 mm
• Rake angle: 0° (negative)
• Tolerance class: M

Special features

• Chipbreaker: MK5
• Shape: Triangle 60°
• Coating/technology: Tiger‑tec Silver (coated cemented carbide)
• Material suitability: Cast iron (ISO group K)
• Execution: G

FAQ

Which materials is this insert intended for?
The TNMG220408‑MK5 WKK20S turning indexable insert from Walter Tools is intended primarily for cast iron (ISO group K), where its coated grade and chipbreaker handle abrasive wear and short, breakable chips.

What advantage does the Tiger‑tec Silver technology provide?
Tiger‑tec Silver is a coated carbide technology that improves wear resistance and process stability on abrasive materials, resulting in longer tool life and more consistent surface quality during cast‑iron turning.

How does the MK5 chipbreaker affect machining?
The MK5 chipbreaker promotes controlled short chip formation and reliable evacuation in cast‑iron machining, reducing the risk of entangling chips and supporting steady production runs.

What are the key dimensions and tolerances of the insert?
The insert has an inscribed circle of 22 mm, a thickness corresponding to the 04 designation (4.0 mm), a corner radius of 0.8 mm, and a tolerance class M for consistent fitting and repeatable positioning.

Is this insert suitable for interrupted cuts or heavy cross‑sections?
Yes—the 0° (negative) rake and robust geometry make this insert well suited to interrupted cuts and heavier cross‑sections typically encountered in cast‑iron applications.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanation only and do not indicate any affiliation with our company. The offered item is original, brand‑new merchandise from the manufacturer Walter Tools.