CNMG090308-MK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of consistent chip control, high wear resistance and a geometry designed for stable turning of cast iron; the result is fewer tool changes and steady production. Order the insert directly via Metav Werkzeuge or consult our experts for application-specific advice.

CNMG090308-MK5 WKK20S – indexable turning insert, Tiger·tec Silver coating, Walter Tools

A CNMG090308-MK5 WKK20S indexable turning insert engineered for robust cast iron machining, featuring a rhombic 80° form and a negative 0° rake for stable, repeatable cuts

• Tiger·tec Silver coating for high wear resistance
• Optimised for cast iron machining (ISO group K)
• Rhombic 80° insert with 0.8 mm corner radius
• MK5 chipbreaker for reliable chip control

Longer tool life through abrasion-resistant coating

The Tiger·tec Silver coating and the WKK20S grade address the abrasive wear typical of cast iron. This combination delivers improved wear resistance and heat management during interrupted cuts, which reduces flank wear and extends edge life. The coated carbide composition is tuned specifically for the short, brittle chips and abrasive conditions encountered when machining cast iron, so fewer interruptions for insert changes and consistent component quality are realistic production outcomes.

Stable geometry for predictable process security

The rhombic 80° form with a 0° (negative) rake and a 0.8 mm corner radius provides a rigid cutting edge that resists micro‑vibrations and maintains dimensional stability. The MK5 chipbreaker supports controlled chip formation, improving evacuation and reducing the risk of built-up edge. Together these features promote process security and help maintain surface finish and tolerance adherence in series production, especially where repeatability is critical.

Application focus and economic benefits for turning shops

Designed for ISO group K materials, this insert suits a broad range of cast iron turning tasks, from roughing to finishing operations that benefit from a durable edge. The geometry and coating reduce downtime and tooling consumption, which contributes to lower unit costs over long production runs. In combination with suitable tool holders, the insert supports efficient cycle times and predictable maintenance intervals, making it a pragmatic choice for workshops prioritising throughput and reliability.

For reliable cast iron machining with Walter Tools’ Tiger·tec Silver technology, contact Metav Werkzeuge for availability and tailored recommendations via info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: CNMG090308-MK5-WKK20S-WALTER
• Label: Drehwendeschneidplatte CNMG090308-MK5 WKK20S Walter Tools
• Manufacturer: Walter Tools
• Product type: Drehwendeschneidplatte
• Series: Tiger-tec Silver
• Designation: CNMG090308-MK5 WKK20S
• Execution: G

Facts

• Insert shape: Rhombus 80°
• Size: 09
• Thickness: 03
• Corner radius: 0.8 mm
• Chipbreaker: MK5
• Relief angle: 0° (negative)
• Tolerance class: M
• Grade: WKK20S
• Substrate material code: K

Special features

• Suitable for: Cast iron (ISO group K)
• Coating technology: Tiger·tec Silver
• Intended use: Turning / indexable insert
• Series characteristics: abrasion-resistant, universal toughness

FAQ

What materials is this insert intended for?
The CNMG090308-MK5 WKK20S insert is intended primarily for cast iron (ISO group K) and is optimised for the abrasive and short‑chip behaviour of those materials.

How does the MK5 chipbreaker improve machining?
The MK5 chipbreaker on the CNMG090308-MK5 WKK20S promotes consistent chip formation and evacuation, which reduces the likelihood of chip-related interruptions during turning.

What does the 0° negative relief angle mean for cutting?
A 0° (negative) relief angle increases edge strength and stability under heavy or interrupted cuts, improving process security when machining challenging cast iron components.

How does the Tiger·tec Silver coating affect tool life?
The Tiger·tec Silver coating enhances wear resistance and thermal stability, resulting in longer edge life and fewer insert replacements in abrasive cast iron applications with the WKK20S grade.

Is the insert suitable for finishing as well as roughing?
Yes, the combination of a 0.8 mm corner radius and the coated grade enables the insert to be used from robust roughing to many finishing operations where a durable edge and consistent surface quality are required.

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

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