WCMT040204-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and the RK4 chipbreaker for consistently productive machining of cast iron; the trigon 80° shape and 0.4 mm corner radius deliver stable edge engagement and predictable tool life. Order directly via Metav Werkzeuge or consult our team for application-specific recommendations.

WCMT040204-RK4 WKK20S — Trigon 80° turning insert with Tiger·tec Silver for cast iron, Walter Tools

WCMT040204-RK4 WKK20S is a trigon-shaped turning insert optimised for efficient machining of cast iron, combining a Tiger·tec Silver coating with a dedicated RK4 chipbreaker for stable and productive cutting.

• Tiger·tec Silver coating for wear resistance
• RK4 chipbreaker for controlled chip formation
• Trigon 80° geometry for interrupted cuts
• Optimised for cast iron machining

Extended tool life and consistent productivity for cast iron

The coated carbide grade WKK20S offers enhanced resistance to abrasive wear, making it a reliable choice for prolonged work on cast iron components. The Tiger·tec Silver technology reduces flank and crater wear under the thermal and abrasive conditions typical of cast iron machining, resulting in fewer insert changes and more uninterrupted production time. This stability translates directly into predictable cycle times and lower overall tooling consumption.

Predictable chip control and improved surface stability

Equipped with the RK4 chipbreaker, the insert ensures controlled breakage of the typically short and brittle chips produced when turning cast iron. The Trigon 80° geometry and the modest 0.4 mm corner radius combine to provide a stable cutting edge that handles interrupted cuts and variable engagement without excessive vibration. The resulting chip form and edge stability contribute to consistent surface quality and reduced rework.

Practical benefits for process engineers and workshop supervisors

The nominal 7° relief angle and compact insert size are suited to diverse turning setups where reliable edge life and repeatable results are required. Using this insert grade can help to simplify grade selection across a range of cast iron applications, reducing inventory complexity. Technical teams benefit from the combination of grade performance and chip control, which supports higher material removal rates while maintaining tool life and surface requirements.

Application guidance and integration into production

The insert is specifically formulated for the ISO group K (cast iron), providing a focused solution for grey and nodular cast iron operations. Its combination of a robust coating and an effective chipbreaker makes it suitable for both continuous and interrupted turning tasks in engine components, brake parts and other cast-iron workpieces. For best results, align cutting parameters with the machine rigidity and part clamping to exploit the insert's wear resistance and chip control.

For targeted cast iron performance with Walter Tools' Tiger·tec Silver grade, contact Metav Werkzeuge for cutting-data support or to place an order via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: WCMT040204-RK4-WKK20S-WALTER
• Description: Bohr-/Aufbohrwendeschneidplatte / Drehwendeschneidplatte
• Designation: WCMT040204-RK4 WKK20S
• Manufacturer: Walter Tools

Facts

• Relief angle: 7°
• Corner radius: 0.4 mm
• Insert shape: Trigon 80°
• Size code: 04
• Thickness code: 02

Special features

• Coating: Tiger·tec Silver
• Grade: WKK20S
• Chipbreaker: RK4
• Tolerance class: M
• Material suitability: Cast iron (ISO group K)

FAQ

What materials is this insert suitable for?
The WCMT040204-RK4 WKK20S is formulated for machining cast iron (ISO group K), where the WKK20S grade and Tiger·tec Silver coating offer improved wear resistance.

How does the RK4 chipbreaker benefit production?
The RK4 chipbreaker on this Walter Tools insert promotes controlled chip formation for cast iron, reducing chip-related disruptions and supporting steady machining performance.

What is the corner radius and why does it matter?
The insert has a 0.4 mm corner radius, which balances edge strength and surface finish, helping to maintain a stable cutting edge during interrupted cuts.

Can this insert handle interrupted cuts?
Yes. The Trigon 80° geometry combined with the robust grade and chipbreaker supports interrupted and variable engagement typical in cast iron components.

Which coating improves the insert's performance?
The Tiger·tec Silver coating enhances abrasive wear resistance and thermal stability, extending insert life in cast iron applications.

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

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