SNMA150612-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of a coated-carbide grade tuned for abrasive cast-iron work, combined with a secure square 90° geometry and an RK5 chipbreaker for consistent short-chip formation; order the insert directly via Metav Werkzeuge or consult our specialists for application advice.

SNMA150612-RK5 WKK20S — indexable turning insert for cast iron by Walter Tools

SNMA150612-RK5 WKK20S is a square 90° indexable turning insert optimised for machining cast iron, featuring the Tiger·tec Silver coating technology and an RK5 chipbreaker for reliable chip control.

• Tiger·tec Silver coated carbide
• RK5 chipbreaker for short chips
• Square 90° geometry with 1.2 mm radius
• 0° negative rake for robust cutting

High-efficiency cast-iron turning that reduces downtime

The SNMA150612-RK5 WKK20S insert is engineered for productive machining of cast iron (ISO group K). The WKK20S grade combines a coated carbide substrate with Tiger·tec Silver technology to resist abrasive wear typical of grey and nodular cast irons. This results in longer useful tool life and fewer index changes, which supports steady production and less unscheduled downtime. The RK5 chip control helps maintain stable cutting conditions, so cycle times remain predictable across batch runs.

Predictable chip control for safe, continuous operation

An effective chip management strategy is vital when machining cast-iron alloys that generate short, brittle chips. The RK5 chipbreaker is designed to promote consistent short-chip formation and evacuation, reducing the risk of workpiece damage and tool interference. Explained simply, the chipbreaker geometry guides the chip curl immediately after formation, lowering the chance of entanglement and facilitating automatic conveyor or pneumatic removal. The result is smoother processes and reduced manual intervention at the machine.

Robust geometry for increased process security

The square 90° format and a 1.2 mm corner radius deliver a balance between edge strength and versatility. A larger corner radius enhances edge durability during interrupted cuts and heavy engagement, while the 0° negative rake provides a negative cutting angle that reinforces the cutting edge against mechanical impact. For operations where stability and repeatability matter, this geometry reduces chatter and maintains workpiece tolerance, supporting consistent surface finish and dimensional control.

Coating and grade benefits explained for straightforward selection

Tiger·tec Silver represents a modern multi-layer coating concept that improves heat resistance and reduces adhesive wear on the cutting edge. The WKK20S designation denotes a Walter Tools grade optimised for abrasive cast-iron applications and universal toughness, making it suitable for a broad range of machining conditions. For users less familiar with grades: a coated carbide insert combines a hard base with a protective layer to delay flank wear and extend edge life, delivering lower tool consumption per part and improved overall economy.

For applications requiring secure, wear-resistant inserts for cast-iron turning, contact Metav Werkzeuge for technical guidance and order processing; email info@metav-werkzeuge.com or call +49 2822 7131930 to discuss suitability and delivery options.

Technical data

• Article number: SNMA150612-RK5-WKK20S-WALTER
• SKU: SNMA150612-RK5-WKK20S-WALTER
• Designation: SNMA150612-RK5 WKK20S

Core specifications

• Insert size: 15 mm
• Plate thickness: 06
• Shape: Square 90°
• Corner radius: 1.2 mm
• Negative rake angle: 0° (negative)
• Chipbreaker: RK5
• Tolerance class: M
• Execution: A

Features & applications

• Series: Tiger-tec Silver
• Grade: WKK20S (coated cemented carbide)
• Recommended material group: Cast iron (ISO group K)
• Suitable for short, breaking chips typical of cast iron
• Application focus: Turning / indexable insert operations

FAQ

Is this insert suitable for cast-iron workpieces? Yes. The SNMA150612-RK5 WKK20S insert from Walter Tools is specifically developed for machining cast iron (ISO group K) and provides wear resistance and chip control for such materials.

What advantage does the RK5 chipbreaker offer? The RK5 chipbreaker promotes short, controlled chips when using the SNMA150612-RK5 WKK20S insert, improving evacuation and reducing the risk of chip entanglement during turning operations.

How does the 0° negative rake affect performance? A negative rake of 0° increases edge robustness for the SNMA150612-RK5 WKK20S, enhancing resistance to mechanical shock and supporting stable cutting in heavy or interrupted cuts.

Can this insert be used for fine finishing or only roughing? With its square 90° geometry and a 1.2 mm corner radius, the insert is versatile; it offers the edge strength needed for heavier cuts while still providing consistent surface quality when used with appropriate cutting parameters.

What does the Tiger·tec Silver designation mean for tool life? Tiger·tec Silver indicates a modern multi-layer coating that improves thermal and adhesive wear resistance, extending the service life of the SNMA150612-RK5 WKK20S insert under abrasive cast-iron conditions.

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

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