TPMT090208-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of durable coating, application-tailored grade and consistent geometry for dependable cast-iron turning. Order the insert directly via Metav Werkzeuge or consult our specialists for process matching and fast delivery.

TPMT090208-MK4 WKK20S turning indexable insert, Triangle 60°, for cast iron — Walter Tools

The TPMT090208-MK4 WKK20S is a triangular turning insert engineered for efficient machining of cast iron components, combining a wear-resistant coating with a chipbreaker optimised for short, brittle chips.

• Tiger·tec Silver coating for wear resistance
• Optimised for cast iron (ISO K)
• Triangle 60° form, 0.8 mm corner radius
• 11° relief angle for stable cutting

Extended tool life through wear-resistant coating

The combination of the Tiger·tec Silver coating and the graded substrate WKK20S results in significantly improved resistance to abrasive wear typical of cast-iron machining. This coated carbide formulation is tuned for intermittent, chipping-prone cut conditions and delivers a measurable reduction in flank and crater wear. The outcome is longer tool life and more economical tool consumption per component, supporting higher uptime and predictable regrinding intervals.

Stable chip control and secure edge geometry

A triangular 60° form with a 0.8 mm corner radius and an 11° relief angle provides a robust cutting edge that resists chipping under interrupted cuts. The integrated MK4 chipbreaker is designed for short, breaking chips commonly encountered with grey and nodular cast irons, improving evacuation and minimising recutting. These geometric choices reduce the need for frequent tool changes and simplify process set-up, resulting in consistently repeatable part quality and less time spent on tool offset adjustments.

Practical fit for production workflows and material groups

Specified for the ISO group K, this insert is suitable wherever cast iron components require efficient material removal with stable surface finish. The item is available in the Tiger‑tec Silver series and intended for applications that demand high wear resistance and stable chip formation. Selection of this insert supports a rational machining strategy: fewer interruptions, reliable surface quality, and predictable tool behaviour — advantages that directly contribute to throughput and process reliability in series production and jobbing alike.

Choose Walter Tools Tiger·tec Silver inserts for reliable cast-iron turning — contact Metav Werkzeuge for process advice and item availability at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• SKU: TPMT090208-MK4-WKK20S-WALTER
• Article: TPMT090208-MK4 WKK20S
• Manufacturer: Walter Tools
• Product type: Turning indexable insert

Core data

• Grade: WKK20S
• Series: Tiger·tec Silver
• Material group: K (cast iron)
• Relief angle: 11°
• Tolerance class: M

Design & special features

• Shape: Triangle 60°
• Corner radius: 0.8 mm
• Size designation: 09
• Thickness designation: 02
• Chipbreaker: MK4
• Substrate/execution: T
• ISO designation: TPMT090208-MK4 WKK20S

FAQ

What materials is this insert best suited for?
The insert is optimised for cast iron (ISO group K); the WKK20S grade and Tiger·tec Silver coating are tailored to abrasive wear and short, breaking chips typical of cast-iron machining.

How does the MK4 chipbreaker affect performance?
The MK4 chipbreaker promotes short, manageable chips with cast iron, improving chip evacuation and reducing the risk of entanglement; this enhances process stability for TPMT090208-MK4 WKK20S inserts.

What benefits does the 0.8 mm corner radius provide?
A 0.8 mm corner radius increases edge robustness and improves surface finish during finishing and medium-turning operations, offering a balance between strength and cutting precision.

Is this insert compatible with standard triangular toolholders?
Yes, the triangular 60° form conforms to common indexable insert holders for the TPMT09 size; the geometry supports secure clamping and repeatable positioning.

How does WKK20S differ from more general-purpose grades?
WKK20S is a Walter Tools grade in the Tiger·tec Silver family focused on wear resistance for cast iron; it emphasises stability under abrasive conditions rather than universality across all ferrous materials.

Manufacturer: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen; Germany

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanation only; there is no connection implied between our company and the manufacturers named. The offered item is an original, factory-new product of the manufacturer.