WNMG080404-MK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating, a dedicated WKK20S grade for abrasive materials and a proven MK5 chipbreaker to maintain production continuity in cast iron turning; order through Metav Werkzeuge or consult the team for application-specific cutting data.

WNMG080404-MK5 WKK20S turning insert for cast iron, Trigon 80° / 0.4 mm corner – Walter Tools

The WNMG080404-MK5 WKK20S is a trigon 80° indexable turning insert, designed for robust machining of cast iron with a coated cemented-carbide grade and a chipbreaker optimised for short, controllable chips.

• Tiger·tec Silver coated grade WKK20S
• Optimised for cast iron (ISO group K)
• Trigon 80° geometry for secure seating
• MK5 chipbreaker for controlled chips
• 0.4 mm corner radius, 0° negative rake

Extended tool life and consistent wear behaviour for cast iron

The coated cemented-carbide WKK20S grade, part of the Tiger·tec Silver series, is formulated to resist the abrasive wear typical of grey and nodular cast irons. The coating reduces flank wear and thermal degradation, which translates into longer intervals between index changes and a steadier surface finish across batches. By combining a wear-resistant grade with a purpose-designed chipbreaker, the insert sustains productive cutting windows and reduces the frequency of unplanned tool changes, supporting continuous machining processes in series production.

Geometry and chip control that support process reliability

The Trigon 80° format with a 0.4 mm corner radius and 0° negative rake provides a stable cutting edge and reliable seating in WNMG toolholders. The MK5 chipbreaker produces short, manageable chips when turning abrasive cast-iron grades, lowering the risk of surface damage and easing chip evacuation. Tolerance class M ensures consistent dimensions for repeatable clamping and predictable tool life, which is essential for maintaining tolerances in high-volume turning operations and for automated tool-change cycles.

Practical advantages for shop-floor integration and setup

As an indexable turning insert, the component matches standard WNMG toolholders and facilitates rapid replacement, minimising downtime. The insert’s design balances edge strength and surface quality—its 0.4 mm corner radius provides sufficient robustness for interrupted cuts while still delivering acceptable roughness in finishing passes. The coated grade is tailored to the abrasive nature of cast iron (ISO group K), meaning operators can rely on a package that combines easy handling, measurable performance, and consistent cutting results across different cast-iron workpieces.

For machining tasks that demand reliable chip control and extended tool life with Walter Tools’ Tiger·tec Silver grade, contact Metav Werkzeuge for purchase and tailored cutting-data recommendations.

Technical data

• SKU: WNMG080404-MK5-WKK20S-WALTER
• Designation: WNMG080404-MK5 WKK20S
• Product type: Turning insert
• Brand: Walter Tools
• Series: Tiger·tec Silver

Facts

• Size: 08
• Thickness: 04
• Corner radius: 0.4 mm
• Rake angle: 0° (negative)
• Inscribed angle: 80°
• Tolerance class: M

Special features

• Grade: WKK20S, coated cemented carbide
• Chipbreaker: MK5
• Suitable for: Cast iron (ISO group K)
• Geometry: Trigon 80°
• Application: Turning operations

FAQ

Which materials is this insert designed for?
The WNMG080404-MK5 WKK20S insert from Walter Tools is optimised for machining cast iron (ISO group K), where abrasive wear and short, breaking chips are typical.

What does the Tiger·tec Silver coating deliver?
The Tiger·tec Silver coating on the WKK20S grade improves wear resistance and thermal stability, extending the effective tool life and enabling steadier cutting performance in abrasive cast-iron applications.

How does the MK5 chipbreaker influence chip formation?
The MK5 chipbreaker produces short, controllable chips on cast-iron materials, reducing entanglement and assisting reliable evacuation during turning with the WNMG080404-MK5 insert.

Is the insert compatible with standard WNMG toolholders?
Yes, the WNMG080404-MK5 WKK20S follows the WNMG ISO format and is compatible with toolholders designed for this insert style, allowing straightforward replacement and setup.

What machining tasks suit the 0.4 mm corner radius?
A 0.4 mm corner radius achieves a compromise between edge strength and surface finish; it is suitable for medium-duty roughing and semi-finish turning of cast iron using stable cutting parameters.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and protected trade names are mentioned solely for explanatory purposes and do not imply any affiliation or endorsement by Metav Werkzeuge. The offered item is original, brand-new product from the manufacturer.