WCMT080408-RK4 WKK20S RK4 Wendeplatten - Walter Tools

Benefit from a combination of high process reliability, robust chip control and long tool life thanks to the Tiger·tec Silver coating and the RK4 chipbreaker; ideal for efficient cast iron turning and boring. Secure procurement and technical support are available through Metav Werkzeuge for smooth integration into production.

WCMT080408-RK4 WKK20S – Trigon 80° turning/boring insert, Tiger·tec Silver by Walter Tools (for cast iron)

The WCMT080408-RK4 WKK20S is a trigon 80° indexable insert engineered for turning and boring operations in cast iron, combining a Tiger·tec Silver coated carbide grade with a dedicated RK4 chipbreaker for controlled, repeatable machining.

• Tiger·tec Silver coated carbide for cast iron
• Trigon 80° geometry for stable cutting
• RK4 chipbreaker for reliable chip control
• 0.8 mm corner radius for consistent edge life

Higher productivity through optimised coating and grade

The combination of the Tiger·tec Silver coating and the WKK20S carbide grade yields a balance between wear resistance and toughness that is especially advantageous when machining abrasive cast iron. The coating reduces flank wear and protects the cutting edge against thermal and mechanical stresses, which translates into longer tool life and fewer indexings. For production environments where uptime and repeatable component quality matter, this insert supports higher process reliability and lower tooling costs compared with uncoated or ill‑matched grades.

Stable cutting geometry for improved surface finish and repeatability

The trigon 80° form provides a stable support geometry that reduces vibration in interrupted cuts and contributes to a consistent cutting angle during turning and boring cycles. Combined with the RK4 chipbreaker, the insert shapes and controls chips into predictable forms, reducing the risk of entanglement and minimising secondary finishing work. The 0.8 mm corner radius increases edge robustness without compromising dimensional accuracy, helping to maintain component tolerances over longer tool life and fewer tool changes.

Consistent chip control and process security in daily use

Designed for the demands of cast iron machining, the RK4 chipbreaker and the coated carbide ensure efficient evacuation of short, brittle chips typical for these materials. This results in stable machining conditions, improved surface integrity and fewer interruptions in automated or manual workflows. The insert’s characteristics support producers aiming for repeatable results and reduced scrap rates while keeping cycle times competitive—an advantage for both job shops and larger production lines.

Easy integration into tooling systems and practical suggestions

The insert fits standard toolholders that accept trigon 80° indexable plates and is suitable for turning and boring applications where cast iron is the primary workpiece material. For best results, pair the plate with appropriate negative‑geometry holders and adapt cutting data to the workpiece grade and machine rigidity; the coated grade performs well at moderate to high cutting speeds typical for cast iron operations. Routine checks of clamping torque and seat cleanliness will help preserve edge life and further improve process stability.

For technical advice or to order the WCMT080408‑RK4 WKK20S by Walter Tools with Tiger·tec Silver performance, please contact Metav Werkzeuge for precise recommendations and direct supply.

Technical data

• SKU: WCMT080408-RK4-WKK20S-WALTER
• Article designation: WCMT080408-RK4
• ISO designation: WCMT080408-RK4 WKK20S
• Manufacturer: Walter Tools
• Product type: Bohr-/Aufbohrwendeschneidplatte / Drehwendeschneidplatte
• Grade / Sort: WKK20S
• Series: Tiger-tec Silver
• Geometry: Trigon 80°
• Chipbreaker: RK4
• Execution: T
• Tolerance class: M

Facts

• Corner radius: 0.8 mm
• Clearance angle: 7°
• Plate size: 08
• Plate thickness: 04
• SKU code: WCMT080408-RK4-WKK20S-WALTER

Special features

• Coating: Tiger·tec Silver
• Material: Coated carbide (WKK20S)
• Optimised for: Cast iron (K)
• Good chip control with RK4 chipbreaker
• Stable cutting edge and process security
• Series description: WKK20S — coated cemented carbide for abrasive cast iron conditions

FAQ

What materials is this insert intended for? The WCMT080408‑RK4 WKK20S is optimised for cast iron machining (ISO group K), using the WKK20S coated carbide grade to handle abrasive wear and short, breaking chips.

How does the RK4 chipbreaker improve production? The RK4 chipbreaker shapes chips into predictable forms, facilitating reliable evacuation and reducing interruptions; this enhances process security and repeatable surface quality with the Walter Tools insert.

Which geometry suits interrupted cuts and stability? The trigon 80° geometry offers improved support and reduced vibration in interrupted turning or boring, contributing to stable cutting conditions and consistent edge life.

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

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