TNMA220412-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and the WKK20S grade tailored for cast iron together with the RK5 chipbreaker and robust 60° triangular form for reliable chip control and extended tool life. Order the insert directly via Metav Werkzeuge or ask the consultants for process recommendations.

TNMA220412-RK5 WKK20S Turning indexable insert — Tiger·tec Silver for cast iron (Walter Tools)

The TNMA220412-RK5 WKK20S is a 60° triangular turning insert engineered for productive and repeatable machining of cast iron components in industrial turning applications.

• Tiger·tec Silver coating for extended life
• Grade WKK20S optimised for cast iron
• RK5 chipbreaker for controlled chip formation
• Triangle 60° form with 1.2 mm corner radius

Long-lasting wear resistance for predictable production

The combination of the Tiger·tec Silver coating and the WKK20S grade is designed to deliver enhanced wear resistance when machining abrasive cast iron. This coating technology reduces flank and crater wear, which leads to more consistent tool life and fewer unscheduled insert changes. For production environments where repeatability matters, the improved durability translates into lower tooling cost per part and more stable cycle times, supporting efficient planning and throughput.

Secure chip control and stable cutting performance

The RK5 chipbreaker has been developed to produce short, controlled chips when turning cast iron, reducing the risk of chip entanglement and improving process safety. Combined with the negative relief angle of 0° and the 60° triangular geometry, the insert offers strength at the cutting edge and reliable engagement under interrupted cuts. The 1.2 mm corner radius increases edge robustness, which helps to maintain surface quality while resisting edge chipping during heavy or variable cuts.

Easy integration and consistent results on the shop floor

The insert’s designation and form enable straightforward mounting in standard indexable turning toolholders and simple indexing for multiple edges, promoting quick tool replacement and minimal downtime. The tolerance class M and the clear ISO designation support consistent clamping and reproducible results across tool pockets. For workshops seeking a balance of productivity and tool life, this insert offers a practical solution for series turning of cast iron, with clear advantages in process reliability and part quality.

Contact Metav Werkzeuge for cutting-data advice, availability and ordering of Walter Tools TNMA220412-RK5 WKK20S inserts.

Technical Data

• Article number / SKU: TNMA220412-RK5-WKK20S-WALTER
• Designation: TNMA220412-RK5 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger-tec Silver

Facts

• Shape: Triangle 60°
• Corner radius: 1.2 mm
• Relief angle: 0° (negative)
• Size: 22
• Thickness: 04
• Tolerance class: M

Special features

• Grade: WKK20S (coated carbide)
• Chipbreaker: RK5
• Material group suitability: cast iron
• Execution: A
• Intended application: machining of cast iron

FAQ

What materials is this insert intended for?
The TNMA220412-RK5 WKK20S is optimised for machining cast iron, reflecting the WKK20S grade’s focus on abrasive wear resistance and short, breaking chip behaviour.

How does the RK5 chipbreaker influence machining?
The RK5 chipbreaker on this Walter Tools turning insert promotes short, controllable chips and stable evacuation during cast iron turning, improving process safety and reducing interruptions.

What advantages does the Tiger·tec Silver coating provide?
The Tiger·tec Silver coating increases wear resistance and thermal stability, resulting in longer edge life and more consistent cutting performance when turning abrasive cast iron components.

Is the 60° triangular form suitable for heavy cuts?
A 60° triangle with a 1.2 mm corner radius offers a robust cutting edge and good strength for variable and interrupted cuts, supporting productive machining strategies on cast iron parts.

Can the insert be used in standard toolholders?
Yes, the insert’s ISO designation and tolerance class M ensure compatibility with standard indexable turning toolholders and facilitate reliable clamping and indexing.

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

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