WNMA100612-RK5 WKK20S Wendeplatten - Walter Tools

The combination of the Tiger·tec Silver coating, a robust WKK20S grade and the Trigon 80° geometry delivers stable chip control and extended cutting performance for cast-iron applications; ideal where repeatable results and predictable tool life matter. Order directly via Metav Werkzeuge or consult the team for selection and availability.

WNMA100612-RK5 WKK20S indexable turning insert for cast iron machining — Walter Tools

The WNMA100612-RK5 WKK20S is an indexable turning insert optimised for abrasive cast-iron work, offering a Trigon 80° format with RK5 chipbreaking and a 0° negative rake for consistent performance in demanding shop-floor conditions.

• Tiger·tec Silver coating for long tool life
• Optimised for cast iron machining (ISO K)
• Trigon 80° geometry for secure clamping
• 0° negative rake with 1.2 mm corner radius

Predictable performance for abrasive cast-iron turning

The WKK20S grade, applied within the Tiger·tec Silver series, is formulated specifically for cast-iron machining (ISO K). This coated carbide combination mitigates abrasive wear and copes well with the short, brittle chips typical of grey and nodular cast iron, which helps to maintain dimensional stability over longer cutting cycles. As a result, users benefit from fewer insert changes, more consistent workpiece tolerances and a measurable increase in productive cutting time when compared with unoptimised grades.

Reliable chip control and process security

The integrated RK5 chipbreaker is engineered to create short, controllable chips when machining cast iron, reducing the risk of chip entanglement and improving surface finish. Combined with the Trigon 80° insert shape, which provides a secure seating and stable clamp engagement, the geometry supports reliable cutting forces and repeatable results. The engineering behind the chipformer and geometry reduces downtime and simplifies process parameter selection for operators with varying experience levels.

Robust edge design for consistent edge life

A 0° negative rake with a 1.2 mm corner radius produces a durable cutting edge able to withstand the shock loads and abrasive nature of cast-iron cutting. The insert’s tolerance class M supports interchangeability and predictable fitting in standard tool holders, which simplifies tool management and spindle balancing in precision turning operations. Together, these traits enable stable material removal rates and predictable wear patterns that feed directly into improved planning and cost-efficiency on the shop floor.

Contact Metav Werkzeuge for tailored advice on Walter Tools turning inserts and guidance on integrating the WNMA100612-RK5 WKK20S into existing tool cycles.

Technical data

• Article number: WNMA100612-RK5-WKK20S-WALTER
• Name: WNMA100612-RK5 WKK20S
• Type: Indexable turning insert
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Core data

• Insert size: 10
• Thickness designation: 06
• Corner radius: 1.2 mm
• Insert shape: Trigon 80°
• Rake angle: 0° (negative)
• Chipbreaker: RK5
• Tolerance class: M

Materials & features

• Grade: WKK20S (coated carbide)
• Coating: Tiger·tec Silver
• Suitable for: Cast iron (ISO K)
• Application focus: Turning of abrasive cast-iron materials
• Designation without grade: WNMA100612-RK5
• ISO designation: WNMA100612-RK5 WKK20S

FAQ

Is this insert suitable for all types of cast iron?
The WNMA100612-RK5 WKK20S is optimised for ISO K cast-iron materials and performs best on grey and nodular cast iron where abrasive wear and short chips are typical.

What advantages does the Tiger·tec Silver coating provide?
The Tiger·tec Silver coating on this Walter Tools insert improves wear resistance and thermal stability, extending edge life and helping to maintain consistent cutting performance under heavy-duty cast-iron conditions.

Which tool holders are compatible with the Trigon 80° shape?
The Trigon 80° format is compatible with holders designed for 80° triangular inserts; secure clamping and correct seating are essential to benefit from the geometry’s stability.

How does the RK5 chipbreaker affect machining results?
The RK5 chipbreaker produces short, controlled chips in cast iron, improving surface finish and reducing the risk of chip build-up around the cutting zone, which supports uninterrupted production.

What should be considered when selecting cutting parameters for this insert?
Start with conservative cutting speeds and feeds appropriate for cast iron, then adjust using the insert’s wear behaviour as guidance; the WKK20S grade and Tiger·tec Silver coating allow gradual optimisation for increased material removal rates.

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

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