VCMT160412-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of extended tool life, controlled chip formation and material-specific performance to increase process reliability in cast iron turning; order genuine Walter Tools inserts through Metav Werkzeuge or consult our team for application support.

VCMT160412-RK4 WKK20S indexable turning insert — RK4 chipbreaker, Tiger·tec Silver for cast iron — Walter Tools

A VCMT160412-RK4 WKK20S indexable turning insert designed for efficient machining of cast iron components, combining a Tiger·tec Silver coating with an RK4 chipbreaker for stable, repeatable cutting performance.

Tiger·tec Silver coating for extended tool life
Optimised for cast iron (ISO group K)
RK4 chipbreaker for controlled chip formation
Rhombic 35° shape with 1.2 mm corner radius

Longer tool life through coating technology

The Tiger·tec Silver coating and the WKK20S grade are engineered for the abrasive nature of cast iron. The combination reduces flank and crater wear, which leads to a longer tool life under industrial turning conditions. For machining centres and lathes where tool change frequency impacts uptime, the reduced wear translates into fewer interruptions and lower tooling-related downtime.

Consistent chip control and process security

The RK4 chipbreaker is specifically shaped to handle the short, brittle chips typical of cast iron. This results in predictable chip behaviour and safer swarf evacuation during both continuous and interrupted cuts. Stable chip formation improves process security and helps maintain surface quality without complex coolant strategies.

Geometry that supports productivity and accessibility

The rhombic 35° insert form with a 1.2 mm corner radius and a 7° clearance angle provides a balance between cutting strength and accessibility in tight turn features. The insert geometry enables productive cuts on shoulders and profiles while keeping cutting forces moderate, which is particularly beneficial for medium to heavy-duty turning operations in production environments.

Application guidance and material fit

Classified for ISO group K (cast iron), this insert is tailored to the material’s abrasive wear patterns and tendancy to form short chips. Its coated cemented carbide composition makes it suitable for components where reproducible edge life and surface finish are required. For customers less familiar with insert selection: choosing the correct chipbreaker and grade reduces the need for trial-and-error setup and speeds up process ramp-up.

Operational advantages in series production

Using this insert in serial machining can improve overall process economics by reducing the frequency of regrinding or replacement and by ensuring more consistent component quality. The robust cutting edge and coating technology contribute to stable cutting performance and predictable tool-change intervals, supporting both small-batch flexibility and high-volume throughput.

Contact Metav Werkzeuge for tailored recommendations and availability of Walter Tools Tiger·tec Silver inserts such as VCMT160412-RK4 WKK20S — email info@metav-werkzeuge.com or call +49 2822 7131930 to discuss application-specific tooling solutions

Technical data

• Article number: VCMT160412-RK4-WKK20S-WALTER
• Designation: VCMT160412-RK4 WKK20S
• Product type: Indexable turning insert
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Facts

• Size: 16
• Thickness: 04
• Corner radius: 1.2 mm
• Clearance angle: 7°
• Tolerance class: M

Special features

• Coating: Tiger·tec Silver
• Grade: WKK20S (coated cemented carbide)
• Chipbreaker: RK4
• Shape: Rhombus 35°
• Suitable for: cast iron (ISO group K)

FAQ

What materials is this insert intended for?
The VCMT160412-RK4 WKK20S is intended primarily for cast iron applications and is optimised for the abrasive and short-chip characteristics of those materials.

Which chipbreaker does the insert use and why is that important?
The insert features an RK4 chipbreaker; this chipbreaker design promotes controlled, short-chip formation, improving swarf control and process reliability when turning cast iron.

How does the Tiger·tec Silver coating benefit production?
The Tiger·tec Silver coating on the WKK20S grade reduces abrasive wear and extends edge life, resulting in longer tool life and fewer tool changes in serial machining.

Is the insert suitable for interrupted cuts?
Yes, the combination of grade and geometry offers good resistance to mechanical and thermal stress, making it appropriate for interrupted cuts commonly encountered in component turning.

Geschützte Markenzeichen und Warenbezeichnungen liegen im Recht ihrer jeweiligen Eigentümer. Markennamen und geschützte Warenzeichen werden ausschließlich zu Erklärungszwecken genannt. Es besteht keinerlei Verbindung zwischen unserem Unternehmen und den genannten Marken. Es handelt sich bei dem angebotenen Artikel um originale fabrikneue Waren des Herstellers. Hersteller: Walter Tools; Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen