TNMG160412-MK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating for improved wear resistance, the WKK20S grade optimised for cast iron, and the 60° triangular form with a 1.2 mm corner radius for stable chip control and consistent productivity. Order the TNMG160412-MK5 WKK20S directly via Metav Werkzeuge or consult the technical team for application support.

TNMG160412-MK5 WKK20S — Turning insert TNMG160412-MK5, WKK20S grade for cast iron by Walter Tools

TNMG160412-MK5 WKK20S is a triangular indexable insert designed for productive cast-iron turning with a Tiger·tec Silver coating

• Tiger·tec Silver coating for wear resistance
• Optimised for cast iron (ISO K)
• 60° triangle with 1.2 mm corner radius
• Negative rake 0° for robust cutting

Increased process reliability through tailored coating and grade

The combination of the Tiger·tec Silver technology and the WKK20S carbide grade delivers a balance between wear resistance and toughness that is particularly suited to abrasive cast-iron materials. The advanced coating reduces flank wear and maintains a stable cutting edge over longer tool life, which translates directly into higher component consistency and fewer insert changes. Operators unfamiliar with coated carbide will benefit from the predictable wear behaviour: the coating acts as a protective layer while the substrate provides the toughness needed for interrupted cuts typical in cast-iron machining.

Stability and chip control for efficient productivity

The MK5 chipbreaker integrated in this insert is tuned for the brittle, short-chip behaviour of cast iron. Combined with the 1.2 mm corner radius and a 60° triangular shape, the insert promotes reliable chip formation and evacuation, reducing the risk of surface damage and tool holder interference. The 0° (negative) rake increases strength at the cutting edge, allowing for higher feed rates and improved tool life under heavy interrupted cuts. For production environments seeking reproducible cycle times, these design features reduce downtime and improve throughput.

Practical fitment and application guidance for workshop use

The insert conforms to the TNMG geometry family and is compatible with standard TNMG toolholders, offering simple integration into existing toolsets. The thickness and form factor suit conventional turning operations on cast-iron workpieces where abrasive wear is the main challenge. For users assessing process windows, the insert supports a range of cutting conditions: from light finishing to more aggressive roughing passes, always prioritising stable edge performance and consistent surface quality. Where uncertainty exists about holder selection or cutting parameters, Metav Werkzeuge can provide pragmatic setup recommendations to match machine capability and workpiece demands.

For reliable cast-iron turning with Walter Tools’ Tiger·tec Silver technology, contact Metav Werkzeuge for order placement or application advice via info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: TNMG160412-MK5-WKK20S-WALTER
• Product designation: TNMG160412-MK5 WKK20S
• Product type: Drehwendeschneidplatte
• Manufacturer: Walter Tools
• Series: Tiger-tec Silver
• Grade: WKK20S

Facts

• Insert size: 16
• Thickness: 04
• Corner radius: 1.2 mm
• Plate form: Triangle 60°
• Free cutting angle: 0° (negative)
• Chipbreaker: MK5
• Tolerance class: M

Special features

• Coating: Tiger·tec Silver (coated carbide)
• Material group suitability: Cast iron (ISO K)
• Execution: G
• Material code: K
• ISO designation: TNMG160412-MK5 WKK20S

FAQ

What materials is this insert designed for?
The TNMG160412-MK5 WKK20S from Walter Tools is optimised for cast iron (ISO group K), with the WKK20S grade tuned to resist abrasive wear typical of those materials.

How does the Tiger·tec Silver coating help in production?
The Tiger·tec Silver coating on this turning insert reduces flank wear and improves heat resistance, which extends effective tool life and supports consistent surface quality across production batches.

Is the insert compatible with standard TNMG toolholders?
Yes, the TNMG geometry is industry standard; the TNMG160412-MK5 WKK20S fits common TNMG toolholders used for external turning operations.

What advantages does the MK5 chipbreaker provide?
The MK5 chipbreaker is configured for short, brittle chips from cast iron, promoting controlled chip formation and reliable evacuation to prevent surface damage and holder interference.

Can this insert be used for roughing and finishing?
The design of the TNMG160412-MK5 WKK20S allows for a broad application range—from more aggressive roughing passes to finishing—by selecting appropriate feeds and speeds while benefiting from the robust 0° negative rake edge.

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

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