CCMT120404-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of a robust cutting solution that combines the Tiger·tec Silver coating with the WKK20S grade for consistent wear resistance and chip control in cast iron machining; the rhombic geometry with a 0.4 mm corner radius and RK4 chipbreaker ensures repeatable surface quality and reliable chip evacuation. Order directly via Metav Werkzeuge or consult the team for application-specific advice.

CCMT120404-RK4 WKK20S indexable turning insert, Tiger·tec Silver grade for cast iron — Walter Tools

The CCMT120404-RK4 WKK20S is an indexable turning insert engineered for efficient machining of cast iron, combining a wear-resistant coating with a chipbreaker geometry that supports stable cuts and predictable tool life.

• Tiger·tec Silver coating for high wear resistance
• Optimised for cast iron (ISO group K)
• Rhombic 80° insert with 0.4 mm corner radius
• RK4 chipbreaker for reliable chip control

Improve cycle time with wear-resistant coating and grade

The coated Tiger·tec Silver technology together with the WKK20S cemented carbide grade targets the abrasive wear typical of cast iron, delivering a balance between durability and toughness. This combination reduces flank wear development and maintains a sharper cutting edge for longer, which translates directly into improved cycle times and fewer insert changes per shift. The result is a more predictable process window and reduced unplanned downtime in batch and continuous production.

Stable geometry for consistent surface finish and repeatability

A rhombic 80° shape with a 0.4 mm corner radius and a 7° clearance angle provides a versatile geometry that is well suited to a range of turning operations in cast iron. The insert’s form offers rigidity at the cutting edge and controlled engagement in interrupted or continuous cuts, supporting repeatable part quality and dimensional stability. Because the geometry is consistent across index positions, the component finish and tolerance adherence remain reliable throughout tool life.

Controlled chip flow and process security for higher productivity

The RK4 chipbreaker is designed to form short, manageable chips when machining cast iron, improving evacuation and lowering the risk of tangling or workpiece damage. Better chip control reduces manual intervention and scrap rates, which supports higher overall equipment effectiveness. From a process-safety perspective, the tool’s combination of coating, grade and chipbreaker increases tolerance to variable cutting conditions, making it suitable for demanding production environments where consistent throughput is a priority. For questions about integrating this insert into an existing toolholder or machining cycle, Metav Werkzeuge provides application guidance and cutting data recommendations — email or call for tailored support.

Contact Metav Werkzeuge for specific process recommendations on the Walter Tools CCMT120404-RK4 WKK20S insert and to discuss optimisation for cast iron machining — eMail: info@metav-werkzeuge.com or Telephone: +49 2822 7131930

Technical data

• Article number: CCMT120404-RK4-WKK20S-WALTER
• Designation: CCMT120404-RK4 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver
• Grade: WKK20S
• Product type: indexable turning insert

Numbers / Core technical data

• Clearance angle: 7°
• Corner radius: 0.4 mm
• Size: 12
• Thickness code: 04
• Tolerance class: M

Special features / Versions

• Tiger·tec Silver coating
• RK4 chipbreaker
• Rhombic 80° geometry
• Coated cemented carbide grade
• Application: cast iron (ISO group K)

FAQ

Which materials is this insert intended for?
The CCMT120404-RK4 WKK20S insert from Walter Tools is optimised for machining cast iron (ISO group K), with a grade and coating tailored to abrasive wear and short, brittle chip formation.

What advantages does the RK4 chipbreaker provide?
The RK4 chipbreaker on this turning insert creates short, controllable chips in cast iron, improving evacuation and reducing the likelihood of chip-related interruptions or surface damage.

What does the Tiger·tec Silver series offer for production?
Tiger·tec Silver provides a durable coating system that enhances wear resistance and thermal stability; when combined with the WKK20S grade it supports longer tool life and consistent cutting-edge performance in abrasive materials.

How does the rhombic 80° geometry affect cutting performance?
A rhombic 80° shape balances access to the workpiece with cutting-edge strength, allowing stable engagement and repeatable surface finish; the 0.4 mm corner radius helps maintain dimensional accuracy during turning.

Is this insert suitable for finishing or roughing operations?
The WKK20S grade is designed as a universal/tough option within the Tiger·tec Silver family, making the insert suitable for a broad range of turning tasks in cast iron, offering a compromise between wear resistance and toughness for flexible use.

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