WNMA080408-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of a robust cutting solution that combines the Tiger‑tec Silver coating and the RK5 chipbreaker for consistent chip control and extended tool life; order directly via Metav Werkzeuge or consult our specialists for application-specific advice.

WNMA080408-RK5 WKK20S turning insert — Tiger‑tec Silver, RK5 chipbreaker, for cast iron machining — Walter Tools

The WNMA080408-RK5 WKK20S is a Trigon 80° turning insert optimised for productive machining of cast iron components, offering robust edge stability for demanding turning operations

• Trigon 80° geometry for heavy cutting
• Tiger‑tec Silver coated carbide for wear resistance
• RK5 chipbreaker for controlled chip formation
• Optimised for cast iron machining

Consistent chip control increases process reliability

The combination of the RK5 chipbreaker and the Tiger‑tec Silver cutting material delivers reliable chip formation, reducing interruptions in production and lowering secondary operations. The chip geometry has been engineered for abrasive cast iron workpieces, where frequent short, breaking chips are typical; this results in fewer built‑up edge incidents and more predictable removal rates. In practical terms, the improved chip behaviour supports longer, unattended runs and contributes to a steady uptime in batch production.

Geometry and edge strength for secure heavy turning

The Trigon 80° shape with a 0° negative rake and a 0.8 mm corner radius provides a robust cutting edge suited to higher feed rates and interrupted cuts. A negative rake means the insert presents a stronger, more shock‑resistant edge to the workpiece, which is particularly beneficial when machining harder or more brittle cast iron grades. The trigon form also enables versatile tool‑holder positioning, permitting stable engagement and predictable surface finish under increased cutting forces.

Coating and substrate tuned for abrasive cast iron

The grade WKK20S is a coated carbide made using the Tiger‑tec Silver technology, combining a hard, wear‑resistant surface with a tough substrate to handle the abrasiveness of many cast irons. Coatings reduce flank wear and thermal softening at the cutting edge; in combination with the substrate’s toughness this yields a balance between wear resistance and fracture avoidance. For users less familiar with coating terminology: a coated carbide features a thin, engineered layer that protects the carbide body while maintaining sharpness and adhesion under heavy loads.

Production advantages and suitable applications

Thanks to its design and material pairing, this insert is primarily intended for cast iron turning where high process stability and repeatable results are required. The geometry and chip control reduce the need for manual intervention, while the coated grade increases tool life, lowering tooling costs over time. If assistance is required to match insert geometry and grade to a specific machine, Metav Werkzeuge provides technical guidance and can advise on ideal feed, speed ranges and tool‑holder choices for a given casting grade.

For robust, repeatable cast iron turning with Walter Tools' Tiger‑tec Silver grade, contact Metav Werkzeuge for tailored recommendations and rapid supply — eMail: info@metav-werkzeuge.com | Tel: +49 2822 7131930

Technical data

• Article number: WNMA080408-RK5-WKK20S-WALTER
• SKU / designation: WNMA080408-RK5 WKK20S
• Manufacturer: Walter Tools
• Product type: turning insert (indexable turning insert)

Core data

• Plate form / included angle: Trigon 80°
• Free (rake) angle: 0° (negative)
• Corner radius: 0.8 mm
• Plate size: 08
• Plate thickness: 04
• Tolerance class: M

Special features

• Grade: WKK20S (coated carbide, Tiger‑tec Silver series)
• Chipbreaker: RK5
• Suitable material group: cast iron (K)
• Designation without grade: WNMA080408-RK5

FAQ

What materials is this insert designed for?
The WNMA080408-RK5 WKK20S insert is formulated for cast iron machining and is optimised for abrasive, short‑chip behaviour typical of these materials.

How does the RK5 chipbreaker affect machining?
The RK5 chipbreaker promotes controlled, short chip formation on cast iron, improving process security and reducing the risk of chip entanglement during turning operations.

What benefits does the Tiger‑tec Silver grade provide?
The Tiger‑tec Silver coating on the WKK20S grade offers enhanced wear resistance and thermal stability, extending tool life and maintaining consistent surface quality in serial production.

Is the Trigon 80° form suitable for interrupted cuts?
Yes, the Trigon 80° geometry combined with a 0° negative rake and a 0.8 mm corner radius delivers robust edge strength, making the insert well suited to interrupted cuts and heavier feed applications.

Can Metav Werkzeuge advise on cutting parameters?
Technical advice on feeds, speeds and tool‑holder selection is available from Metav Werkzeuge to ensure optimal performance of the WNMA080408-RK5 WKK20S in specific applications.

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

Protected trademarks and trade names remain the property of their respective owners. Trademarks and registered names are used for information only and do not imply any affiliation with our company. The item offered is an original, factory‑new product from the manufacturer.