SNMA190616-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the WKK20S coated-carbide grade and robust RK5 chipbreaker for consistent, productive machining of cast iron; the square 90° geometry with a 1.6 mm corner radius provides edge stability and predictable tool life. Order this insert through Metav Werkzeuge or consult their specialists for cutting data and application support.

SNMA190616-RK5 WKK20S — Indexable turning insert, Tiger‑tec Silver, for cast iron — Walter Tools

A SNMA190616-RK5 WKK20S indexable insert engineered for heavy-duty turning of cast iron components, combining a wear‑resistant coating with a chipformer tuned to breakage-prone materials

• Square 90° insert, 1.6 mm corner radius
• Tiger‑tec Silver coated, wear‑resistant grade
• Optimised RK5 chipbreaker for cast iron
• 0° negative rake for robust roughing

Consistent performance on abrasive cast iron

The WKK20S cutting grade, part of the Tiger‑tec Silver series, was developed to counter the abrasive wear typical of grey and nodular cast irons. The coated carbide construction delivers a balance between hardness and toughness, which reduces flank wear and extends tool life under interrupted cuts. The RK5 chipbreaker promotes short, controllable chips that are less likely to entangle with workholding, improving machining reliability. For operations where cycle time and repeatability matter, this combination of material and chip control supports steady productivity.

Geometry designed for stability and heavy loads

A square 90° insert form combined with a 1.6 mm corner radius provides increased edge strength and reduced risk of corner chipping when encountering hard inclusions or interrupted surfaces. The 0° negative rake reinforces the cutting edge and creates a more robust geometry for roughing and heavy stock removal, sacrificing a small amount of sharpness for substantially improved edge security. These geometrical choices mean fewer insert changes and less unplanned downtime for mid‑ to high‑volume turning processes.

Practical benefits for shop-floor efficiency

Beyond material and geometry, the overall design focuses on easy integration into standard toolholders and predictable machining behaviour. The coated carbide and chipbreaker pairing reduces rework and eases process parameter setting, so cycle times become more consistent. Selection of the correct grade avoids premature wear and lowers tooling costs over production runs. Technical support is available for cutting-speed and feed recommendations, ensuring the grade is applied where it performs best.

For tailored cutting data and fast availability of Tiger‑tec Silver inserts from Walter Tools, contact Metav Werkzeuge for application advice and supply via info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: SNMA190616-RK5-WKK20S-WALTER
• Designation: SNMA190616-RK5 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver

Facts

• Insert size: 19 mm
• Corner radius: 1.6 mm
• Thickness: 06
• Clearance angle: 0° (negative)
• Tolerance class: M

Special features

• Grade: WKK20S (coated carbide)
• Chipbreaker: RK5
• Geometry: Square 90°
• Suitable for: cast iron
• Application focus: roughing and productive turning

FAQ

What materials is this insert suited for? The SNMA190616-RK5 WKK20S insert is optimised for machining cast iron, with the WKK20S grade tuned to handle abrasive wear and broken-chip tendencies common to these materials.

How does the RK5 chipbreaker affect chip control? The RK5 chipbreaker produces short, controlled chips when used on cast iron, improving swarf evacuation and reducing the risk of chip-related interruptions during turning operations.

Is the insert suitable for heavy interrupted cuts? Yes, the combination of a square 90° shape, 1.6 mm corner radius, and 0° negative rake gives enhanced edge strength, making the insert well suited to heavy or interrupted cuts.

Can this grade be used for finishing passes? The SNMA190616-RK5 WKK20S is primarily designed for productive roughing; finishing may require a different geometry or a finer grade depending on surface-finish requirements.

Where can cutting data be obtained? Cutting data and application recommendations are available from Metav Werkzeuge; they can advise on speeds, feeds and toolholder choices for the WKK20S grade.

Walter Tools; Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen; Germany; www.walter-tools.com

Protected trademarks and trade names remain the property of their respective owners. Brand names are mentioned solely for explanation and comparison. There is no affiliation between Metav Werkzeuge and the named manufacturers. The offered item is an original, factory‑new product of the manufacturer.