TNMA160412-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Efficient, stable machining of cast iron is achieved by combining the WKK20S coated-carbide grade with the RK5 chipbreaker and the triangular 60° geometry; the result is improved tool life and reliable chip control. Order the insert directly via Metav Werkzeuge or consult our specialists for application-specific advice.

TNMA160412-RK5 WKK20S indexable turning insert, Tiger·tec Silver coating — for cast iron, Walter Tools

TNMA160412-RK5 WKK20S is an indexable turning insert designed for productive cast iron machining with optimised chip control

• Tiger·tec Silver coating for high wear resistance
• RK5 chipbreaker for stable chip control
• Triangle 60° geometry for positive seating
• Corner radius 1.2 mm for consistent edge life

Boosted productivity through targeted wear resistance

The combination of Tiger·tec Silver coating and the WKK20S grade provides a high level of wear resistance tailored to abrasive cast-iron applications. Coated carbide technology reduces flank and crater wear under interrupted cutting conditions, which translates directly into longer effective tool life and fewer indexings. For workshops aiming to reduce downtime, this means fewer insert changes and a steadier production rhythm while maintaining dimensional stability on the workpiece.

Reliable chip formation and process stability

The RK5 chipbreaker has been developed to produce short, controllable chips when turning grey and ductile cast irons, reducing the risk of entanglement and improving surface quality. The triangle 60° insert shape gives robust support in the toolholder and enables predictable cutting forces, while the corner radius 1.2 mm balances edge strength and surface finish. Together these characteristics ensure a stable machining process and consistent component tolerances in medium to heavy roughing operations.

Practical fit and negative-rake capability for tough cuts

With a negative 0° rake and execution A, the insert resists shock and maintains a strong cutting edge during interrupted cuts or heavy engagement. The insert thickness and seating geometry deliver the rigidity required for demanding turning tasks, reducing vibration and promoting repeatable results. This makes the insert particularly suitable for component processes where robustness and repeatability are essential to throughput.

Application-focused advantages for cast-iron work

Designed for the material group K (cast iron) according to ISO classifications, the coated carbide grade WKK20S is tuned to handle abrasive graphite and frequently brittle chip behaviour typical of cast components. The insert supports shops that need a universal yet resilient solution: it is versatile across different cast-iron types and helps maintain cycle times while protecting the cutter edge from premature wear.

Discuss application requirements with Metav Werkzeuge for tailored recommendations on the Walter Tools TNMA160412-RK5 WKK20S indexable insert — request a material-tailored cutting strategy via info@metav-werkzeuge.com or by phone at +49 2822 7131930

Technical data

• Article number: TNMA160412-RK5-WKK20S-WALTER
• SKU: TNMA160412-RK5-WKK20S-WALTER
• Product type: indexable turning insert
• Grade: WKK20S
• Series: Tiger-tec Silver
• Manufacturer: Walter Tools

Facts

• Plate size: 16 mm
• Corner radius: 1.2 mm
• Insert thickness: 04
• Free angle: 0° (negative)
• Plate form: triangle 60°
• Tolerance class: M

Special features

• Coating: Tiger·tec Silver
• Cutting material: coated carbide (WKK20S)
• Chipbreaker: RK5
• Material group suitability: cast iron (K)
• Execution: A
• Application focus: stable chip control, high wear resistance

FAQ

Which materials is this insert best suited for?
The insert is optimised for cast iron applications; the WKK20S grade and Tiger·tec Silver coating are tuned to the abrasive and breaking-chip behaviour of cast-iron materials.

How does the RK5 chipbreaker affect chip control?
The RK5 chipbreaker produces short, manageable chips in cast iron turning, improving process stability and reducing the need for additional chip handling measures when using the TNMA160412-RK5 WKK20S insert.

Can this insert withstand interrupted cuts and heavy engagement?
Yes — the negative 0° rake and robust triangular seating provide resistance to shock and maintain edge integrity during interrupted or heavy cutting operations.

What production benefits can be expected from using this insert?
Users can expect longer tool life, fewer indexings and more consistent surface quality on cast iron components, leading to improved uptime and predictable component tolerances.

Manufacturer/Responsible: Walter Tools; Derendinger Straße 53; 72072 Tübingen; Germany

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanation only and do not imply any affiliation between our company and the trademark owners. The offered item is an original, factory-new product from the manufacturer.