SNMA120408-RK5 WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of consistent chip control, longer tool life and simple process integration for efficient machining of cast iron parts; order the SNMA120408-RK5 WKK20S directly via Metav Werkzeuge or consult our team for application advice.

SNMA120408-RK5 WKK20S indexable turning insert – Tiger·tec Silver, optimized for cast iron, Walter Tools

SNMA120408-RK5 WKK20S is an indexable turning insert designed for robust and repeatable performance in cast iron turning applications; the square 90° geometry provides stable support for interrupted cuts and facing operations.

• Tiger·tec Silver coated carbide
• Optimised for ISO group K cast iron
• RK5 chipbreaker for secure chip control
• Square 90° with 0.8 mm corner radius

Consistent productivity for cast iron turning

The combination of the WKK20S grade and the Tiger·tec Silver coating delivers a balance between wear resistance and toughness that is engineered for cast iron (ISO group K). The coating, which is a multilayer, PVD-type technology, reduces flank wear and improves adhesion resistance, so that tool life is extended under typical interrupted or abrasive cast iron conditions. The 0° (negative) rake angle is suited to stable, robust cutting, and the square 90° shape gives secure clamping and repeatable edge location, which supports predictable cycle times and reduced machine downtime.

Better surface quality and safer chip evacuation

Thanks to the RK5 chipbreaker geometry, chips are controlled consistently even when machining shorter, brittle chips typical of grey or nodular cast irons. The chipformer is shaped to promote small, segmented chips that evacuate reliably; this lowers the risk of tool or part damage and reduces manual intervention. The 0.8 mm corner radius smooths the cutting edge transition to improve surface finish and edge strength, which is particularly beneficial for finishing passes or where dimensional stability is required.

Integrating the insert into production for measurable gains

The insert’s dimensions—inscribed circle ~12 mm, thickness 4.0 mm, and the compact SNMA120408-RK5 format—allow straightforward toolholder selection and rapid changeovers. The geometry and standard tolerance class M ensure interchangeability and predictable runout control when used with compatible toolholders. For operations seeking improved process stability, the insert’s coated carbide construction supports higher cutting speeds and extended intervals between indexings, offering a clear cost-per-part advantage in medium- to high-volume cast iron turning.

Contact Metav Werkzeuge today for tailored application support on Walter Tools Tiger·tec Silver inserts and to discuss the SNMA120408-RK5 WKK20S for cast iron machining; email info@metav-werkzeuge.com or call +49 2822 7131930 to arrange advice or a recommendation.

Technical data

• SKU: SNMA120408-RK5-WKK20S-WALTER
• Article designation: SNMA120408-RK5 WKK20S
• Manufacturer: Walter Tools / Walter Deutschland GmbH
• Product type: Indexable turning insert (Drehwendeschneidplatte)
• Series: Tiger·tec Silver

Facts

• Inscribed circle / size: 12 mm
• Thickness: 4.0 mm (code 04)
• Corner radius: 0.8 mm
• Rake angle: 0° (negative)
• Geometry: Square 90°
• Tolerance class: M

Special features

• Grade: WKK20S (coated carbide)
• Chipbreaker: RK5
• Optimised for: Cast iron (ISO group K)
• Execution: A
• Suitable applications: Turning, facing, interrupted cuts

FAQ

What types of cast iron is this insert best suited for?
The SNMA120408-RK5 WKK20S by Walter Tools is formulated for general cast iron machining (ISO group K), including grey and nodular cast irons, where the WKK20S grade balances wear resistance and toughness.

How does the RK5 chipbreaker affect machining?
The RK5 chipbreaker on this insert produces controlled, segmented chips for safer evacuation during cast iron turning, which improves process reliability and reduces manual chip management.

Can this insert be used for finishing passes?
Yes, the 0.8 mm corner radius and coated carbide grade support improved surface quality, making the insert suitable for certain finishing operations in cast iron components.

What does the Tiger·tec Silver coating deliver in practice?
Tiger·tec Silver reduces flank wear and increases resistance to abrasive conditions common in cast iron machining, which typically results in longer tool life and more consistent cutting performance.

Hersteller: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen, Germany. Walter AG (brand: Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Sandvik Group. Protected trademarks and trade names are the property of their respective owners. Brand names are used solely for explanation and clarification. The offered item is original, factory-new merchandise of the manufacturer.