CNMA120404-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and the WKK20S grade for dependable performance in abrasive cast-iron turning; the RK5 chipbreaker and rhombic geometry ensure controlled chips and stable edges. Order the CNMA120404-RK5 WKK20S directly via Metav Werkzeuge or consult our specialists for application support.

CNMA120404-RK5 WKK20S indexable turning insert, Rhombic 80° — for cast iron | Walter Tools

The CNMA120404-RK5 WKK20S is an indexable turning insert optimised for productive machining of cast iron components, combining a wear‑resistant Tiger·tec Silver coating with an RK5 chipbreaker for controlled chip formation.

• Tiger·tec Silver coating for enhanced wear resistance
• Optimised for abrasive cast-iron machining
• RK5 chipbreaker for controlled chip formation
• Rhombic 80° shape, 0.4 mm corner radius

Prolonged tool life through advanced coating and grade

The combination of the Tiger·tec Silver coating and the WKK20S carbide grade delivers improved wear resistance and consistent edge life when machining abrasive materials. The multilayer technology used in the coating reduces flank wear and increases process stability, which translates into longer production intervals between index changes and fewer tool interventions. In practical terms, this means more reliable cycle times and less unexpected downtime in repetitive turning operations on cast iron workpieces.

Predictable chip control for safer machining

A carefully configured RK5 chipbreaker and the negative 0° rake geometry provide stable chip formation and evacuation during turning. The chipbreaker reduces the tendency for long, stringy chips typical of some cast-iron cuts, improving surface quality and lowering the risk of tool or workpiece damage. The Rhombic 80° insert form also supports versatile cutting angles in standard CNMA toolholders, allowing secure seating and predictable cutting behaviour across a range of turning applications.

Repeatable dimensional accuracy and edge security

With a 0.4 mm corner radius and M tolerance class, the insert supports consistent edge strength and repeatable results in production environments. The robust corner radius helps to absorb cutting forces during heavier engagement, contributing to improved tool life and steady dimensional control. The 4.00 mm plate thickness and standard CNMA geometry ensure compatibility with common toolholder systems, facilitating quick index changes and minimising setup time on the shopfloor.

Designed specifically for cast-iron productivity

This insert is tuned for the demands of ISO group K materials: abrasive surfaces and frequently breaking chips. The combination of grade, coating and chipbreaker makes it particularly suitable for grey cast iron and similar substrates where abrasive wear is a common concern. For users planning batch production or continuous turning of cast-iron components, this solution offers a balance of process reliability and economical cutting performance. If further guidance is required on application parameters or toolholder choices, Metav Werkzeuge can provide tailored advice to match the production context.

Discuss the Walter Tools CNMA120404-RK5 WKK20S and its suitability for cast‑iron turning with Metav Werkzeuge — our specialists are available for application recommendations at info@metav-werkzeuge.com or by phone at +49 2822 7131930

Technical data

• Article number: CNMA120404-RK5-WKK20S-WALTER
• Designation: CNMA120404-RK5 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver

Facts

• Inscribed circle: 12 mm
• Thickness: 4.00 mm
• Corner radius: 0.4 mm
• Rake angle: 0° (negative)
• Tolerance class: M

Special features

• Coating: Tiger·tec Silver
• Grade: WKK20S
• Chipbreaker: RK5
• Suitable for: cast iron (ISO group K)
• Plate form: Rhombic 80°
• Execution: A

FAQ

Which materials is this insert primarily intended for?
The CNMA120404-RK5 WKK20S is primarily intended for cast iron (ISO group K); the WKK20S grade and Tiger·tec Silver coating are optimised for abrasive cast‑iron conditions.

What advantage does the RK5 chipbreaker provide?
The RK5 chipbreaker promotes short, controlled chips and consistent evacuation, reducing the risk of chip entanglement and improving surface finish in cast‑iron turning applications.

Is the insert suitable for interrupted cuts or heavier engagements?
Yes. The negative 0° rake and the robust WKK20S grade provide edge stability that is well suited to intermittent cuts and heavier engagements commonly encountered in cast‑iron turning.

Which toolholders are compatible with this insert form?
The CNMA geometry corresponds to standard ISO CNMA toolholders; the Rhombic 80° form ensures secure seating and easy indexing in compatible holders.

How does the Tiger·tec Silver coating affect process security?
The Tiger·tec Silver coating increases resistance to abrasive wear, improving consistency and tool life under demanding cast‑iron machining conditions.

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

The Walter AG (brand: Walter Tools), headquartered in Tübingen, is a globally recognised manufacturer of precision tools for metalworking and forms part of the Swedish Sandvik group. Protected trademarks and trade names are the property of their respective owners. Brand names are mentioned for explanation only and do not indicate any affiliation between our company and the trademark owners.