WNMG080412-MK5 WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of proven cutting performance on cast iron, robust edge geometry and reliable chip control for efficient turning operations. Order the inserts directly via Metav Werkzeuge or consult its specialists for application-specific recommendations.

WNMG080412-MK5 WKK20S trigon 80° indexable insert for cast iron, Tiger‑tec Silver (Walter Tools)

The WNMG080412-MK5 WKK20S is a precision trigon 80° indexable insert designed for productive turning of cast iron components, offering a coated carbide grade optimised for abrasive wear and stable chip formation.

• Tiger‑tec Silver coated carbide grade WKK20S
• Trigon 80° geometry for robust cutting
• MK5 chipbreaker for short, controlled chips
• Negative 0° rake for secure, stable cuts

Maximise productivity on abrasive cast iron with a wear‑resistant grade

The Tiger‑tec Silver WKK20S grade provides a coated carbide formulation engineered for abrasive cast iron machining (ISO group K). This composition focuses on reducing flank and crater wear while maintaining a consistent cutting edge under heavy use. The result is longer tool life and fewer index changes, which translates directly into higher machine uptime and lower per‑part tooling cost. For production environments that demand repeatable results and predictable tool change intervals, the combination of coating technology and carbide substrate offers measurable productivity gains.

Secure machining and controlled chips through geometry and chipbreaker design

Geometry plays a decisive role in stability and surface result. The Trigon 80° form, combined with the MK5 chipbreaker and a negative 0° rake, creates a robust cutting arrangement that resists edge chipping and handles interrupted cuts with greater confidence. The insert’s 1.2 mm corner radius contributes to a stronger edge and improved tool life when facing high radial forces. The MK5 chipformer is tuned to produce short, fragmented chips when turning cast iron, reducing the need for elaborate chip evacuation and lowering the risk of reworking or part damage caused by long swarf.

Practical benefits for workshop and production use

This indexable insert is intended for metalworkers and production shops seeking a reliable solution for cast iron turning. The insert’s format supports straightforward seat‑and‑clamp replacement on compatible toolholders, keeping maintenance and tool change times short. Because the grade and geometry are optimised for abrasive cast iron, workpieces commonly show improved surface integrity and consistent dimensional control over long production runs. Documentation of the grade and series supports process planning and tool allocation across multiple machines for standardised setups.

Trusted brand performance and consistent results

Walter Tools’ Tiger‑tec Silver series combines modern coating processes with established carbide technology to deliver stable chip control and reliable edge behaviour. The result is predictable performance across batches and workshops, which supports quality assurance and process stability. Selecting this insert means choosing a component that emphasises repeatability and efficiency in cast iron turning, backed by a manufacturer known for precision tooling and global availability.

Contact Metav Werkzeuge for tailored advice on Walter Tools inserts and application‑specific recommendations — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• SKU: WNMG080412-MK5-WKK20S-WALTER
• Name: WNMG080412-MK5 WKK20S
• Product type: Indexable insert (turning)
• Series: Tiger‑tec Silver
• Grade: WKK20S
• Manufacturer: Walter Tools

Facts

• Plate size: 08
• Plate thickness: 04
• Corner radius: 1.2 mm
• Geometry: Trigon 80°
• Clearance/rake: 0° (negative)
• Tolerance class: M

Special features

• Chipbreaker: MK5
• Coating/grade: WKK20S (coated carbide)
• Suitable for: Cast iron (ISO group K)
• Designed for abrasive wear resistance
• Stable chip formation and short chips
• Robust edge for interrupted cuts

FAQ

Which materials is this insert best suited for?
This insert is optimised for cast iron; the WKK20S grade and Tiger‑tec Silver coating are specifically tuned for ISO group K materials.

What does the MK5 chipbreaker achieve?
The MK5 chipbreaker produces short, controlled chips in cast iron turning, improving chip evacuation and reducing swarf management issues.

How does the Trigon 80° geometry affect cutting?
The Trigon 80° shape provides a strong cutting edge and rigidity, contributing to stable machining and extended edge life under high radial loads.

Is the insert suitable for interrupted cuts or roughing?
Yes. The combination of a 1.2 mm corner radius, negative rake and robust geometry is suited to demanding conditions, including interrupted cuts typically encountered in roughing.

How is the designation WNMG080412-MK5 WKK20S interpreted?
The designation indicates a WNMG form with an 80° trigon shape and specified corner radius, equipped with an MK5 chipbreaker and the WKK20S coated carbide grade by Walter Tools.

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

The Walter AG (brand: Walter Tools) is one of the world’s leading manufacturers of precision cutting tools for metalworking and is part of the Swedish Sandvik group. Protected trademarks and product names belong to their respective owners. Mention of brand names and trademarks is for explanation only; there is no affiliation implied between our company and the trademark holders. The offered article is an original, factory‑new product of the manufacturer.