CNMA120408-RK5 WKK10S WKK10S Wendeplatten - Walter Tools

Benefit from the combination of Tiger‑tec Silver coated carbide and an RK5 chipbreaker for productive, abrasion‑resistant cast‑iron turning; the 0.8 mm corner radius and rhombic 80° geometry ensure stable cutting and consistent surface finish. Order the CNMA120408‑RK5 WKK10S directly via Metav Werkzeuge or request advice from our technical consultants.

CNMA120408-RK5 WKK10S turning insert for cast iron (Walter Tools) — Tiger‑tec Silver, RK5 chipbreaker

The CNMA120408‑RK5 WKK10S is a rhombic 80° turning insert designed for productive machining of cast iron, combining a coated carbide grade with targeted chip control.

• Tiger‑tec Silver coated carbide
• Optimised RK5 chipbreaker
• 0.8 mm corner radius for stability
• Rhombic 80° geometry, 0° negative rake

Consistent productivity for cast‑iron turning

The Tiger‑tec Silver WKK10S grade is a coated carbide engineered to resist the abrasive wear typical of cast‑iron machining. Its coating technology stabilises the cutting edge and extends the interval between insert changes, translating into fewer tool‑change stops and improved machine uptime. The classification for cast‑iron use (material group K) reflects a focus on reliably handling the short, brittle chips common with these materials. For operations seeking steady removal rates and repeatable results, this grade provides a balance of wear resistance and toughness that supports productive turning processes.

Geometry that stabilises cut and chip formation

The combination of an rhombic 80° form and a 0° negative rake produces a robust cutting geometry that tolerates interrupted cuts and hard inclusions often found in cast components. The RK5 chipbreaker is tailored for short, controlled chips, reducing the risk of chip entanglement and improving surface quality. A 0.8 mm corner radius increases edge strength, helping to dampen vibrations and protect the cutting edge during heavy or variable engagement. In practice, these geometric choices lower the probability of edge chipping and contribute to predictable tool life under typical cast‑iron conditions.

Operational advantages and application guidance

Fitting standard CNMA toolholders, the insert delivers straightforward integration into existing tool setups while providing measurable benefits in process stability and surface finish. The coated substrate supports higher cutting speeds compared with uncoated grades, enabling efficient material removal where abrasive wear is dominant. For best results, pair the insert with rigid toolholding and appropriate cutting parameters for cast iron; the RK5 chip control improves swarf evacuation and reduces downtime caused by manual chip handling. For specific cutting data and optimisation for a given machine, our advisors at Metav Werkzeuge can provide tailored recommendations and application support.

Contact Metav Werkzeuge for tailored application advice on Walter Tools Tiger‑tec Silver inserts and to arrange delivery and technical consultation.

Technical data

• Article number: CNMA120408-RK5-WKK10S-WALTER
• Designation: CNMA120408-RK5 WKK10S
• Manufacturer: Walter Tools
• Product type: turning insert

Core specifications

• Shape angle: Rhombic 80°
• Corner radius: 0.8 mm
• Plate size: 12 mm
• Plate thickness: 4 mm
• Rake: 0° (negative)
• Tolerance class: M
• Grade/sort: WKK10S

Special features

• Series: Tiger‑tec Silver
• Coating: coated carbide
• Chipbreaker: RK5
• Application: cast iron (material group K)
• Execution: A

FAQ

What materials is this insert suitable for?
The CNMA120408‑RK5 WKK10S turning insert is specified for cast iron applications (material group K) and is optimised for the abrasive wear and short‑breaking chips typical of these workpieces.

How does the RK5 chipbreaker affect machining?
The RK5 chipbreaker promotes short, controlled chip formation, improving swarf evacuation and reducing the chance of chip re‑cutting when using the WKK10S grade in cast‑iron turning.

Can this insert be used with standard CNMA toolholders?
Yes, the CNMA120408‑RK5 form matches standard CNMA toolholders; ensure correct seat and clamp pressure for the rhombic 80° geometry to maintain stability.

What benefit does the 0.8 mm corner radius provide?
A 0.8 mm corner radius increases edge strength, reduces vibration sensitivity and helps to protect the cutting edge during interrupted cuts, contributing to more consistent surface finishes.

Is Tiger‑tec Silver suitable for high‑speed conditions?
The Tiger‑tec Silver coating enhances wear resistance and allows for efficient cutting speeds in abrasive cast‑iron applications; final speeds should be selected based on machine rigidity and coolant strategy.

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

The Walter AG (brand presentation: Walter Tools), headquartered in Tübingen, is among the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik Group. Protected trademarks and trade names are the property of their respective owners and are mentioned solely for explanatory purposes. The offered article is an original, factory‑new product from the manufacturer.