SPMW120408-RK6 WKK20S Wendeplatten - Walter Tools

Combining the Tiger·tec Silver coating with the WKK20S grade and the RK6 chipbreaker yields a robust solution for machining abrasive cast iron: excellent wear resistance, controlled short-chip formation and consistent edge life. Order directly via Metav Werkzeuge or consult their specialists for application-specific recommendations.

SPMW120408-RK6 SPMW120408-RK6 WKK20S — Indexable turning insert, RK6 chipbreaker, for cast iron by Walter Tools

A SPMW120408-RK6 WKK20S indexable turning insert engineered to deliver productive, repeatable machining of cast iron components in series production environments.

• Tiger·tec Silver coated carbide
• Grade WKK20S optimised for cast iron
• RK6 chipbreaker for reliable chip control
• 0.8 mm corner radius, 11° clearance

Increase material removal and reduce tool changes with a cast-iron optimised grade

The combination of a coated carbide base and the WKK20S formulation from the Tiger·tec Silver family is designed for the abrasive nature of cast iron. This specification permits higher cutting intervals between indexings and reduces the frequency of insert changes, improving overall throughput. The RK6 chip geometry complements the grade by producing short, controllable chips typical for brittle cast materials, which simplifies chip evacuation and reduces the risk of built-up edge. These technical choices translate directly into measurable production efficiency and lower unit machining costs.

Predictable edge life and stable machining for consistent part quality

A stable cutting edge is essential for tight tolerances and repeatable finishes; the insert’s 0.8 mm corner radius and 11° clearance support edge robustness while maintaining accessibility for various turning operations. The square 90° shape offers versatility for external turning and facing tasks, while the tolerance class M ensures consistent insert geometry across batches. Together, these features enhance process reliability and help maintain surface quality over extended production runs, reducing scrap and rework.

Designed for workshop practicality and easy integration into tool programmes

As an indexable turning insert, this component provides the practical advantage of fast re-indexing and minimal toolholder modification. The RK6 chipbreaker is explained simply as a geometry tuned for short, broken chips — ideal when working with grey or nodular cast irons — and the coated carbide backing from Tiger·tec Silver gives improved wear resistance compared with uncoated grades. For production shops seeking steady uptime and predictable maintenance cycles, the insert’s combination of geometry and coating supports consistent tool life and straightforward inventory handling.

Suitable applications and material guidance for reliable results

This insert is specified for ISO group K applications, covering a broad range of cast iron machining tasks from finishing to medium roughing, depending on cutting data and toolholder choice. The Tiger·tec Silver coating improves thermal and abrasive wear behaviour, making the grade particularly applicable where short, brittle chips and abrasive inclusions challenge conventional grades. For machine shops focused on cast-iron components, the geometry and grade selection present a balanced solution between productivity and edge security.

For tailored recommendations on toolholder compatibility and cutting parameters for Walter Tools’ Tiger·tec Silver grade, contact Metav Werkzeuge for expert advice and fast supply at info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• SKU: SPMW120408-RK6-WKK20S-WALTER
• Designation: SPMW120408-RK6 WKK20S
• Manufacturer: Walter Tools
• Product type: Indexable turning insert
• Series: Tiger·tec Silver
• Grade: WKK20S

Dimensions & core data

• Inscribed circle: 12 mm
• Thickness: 4 mm
• Corner radius: 0.8 mm
• Clearance angle: 11°
• Geometry: Square 90°
• Tolerance class: M

Materials & features

• Coating: Tiger·tec Silver coated carbide
• Chipbreaker: RK6
• Application: Cast iron (ISO group K)
• Execution: W
• Plate size code: 12
• Series note: WKK20S suited to abrasive cast-iron machining

FAQ

Which materials is this insert suitable for?
The insert is designed for ISO group K materials; the WKK20S grade and Tiger·tec Silver coating make it particularly suitable for a wide range of cast iron machining tasks.

What benefit does the RK6 chipbreaker provide?
The RK6 chipbreaker promotes short, broken chips when machining brittle cast iron, improving chip control and evacuation during the cut.

How does the Tiger·tec Silver grade affect tool life?
Tiger·tec Silver enhances resistance to abrasive wear and heat, contributing to longer, more predictable edge life for WKK20S inserts in cast-iron operations.

Can this insert be used for roughing as well as finishing?
The geometry and grade offer a balance suited to finishing and medium roughing in cast iron; specific cutting data should be matched to the application and toolholder.

What does the code SPMW120408 indicate?
The code denotes the insert form and dimensions: square 90° outline with a 12 mm inscribed circle, 4 mm thickness and a 0.8 mm corner radius, combined with the RK6 chipbreaker and WKK20S grade.

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