VNMA160408-RK5 WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and an RK5 chipbreaker for stable, productive machining of cast iron; the 0° negative rake and rhombic 35° geometry deliver reliable tool life and consistent chip control. Order the insert directly via Metav Werkzeuge or consult the Metav team for application advice.

VNMA160408-RK5 WKK20S Drehwendeschneidplatte – 0° negative rake, RK5 chipbreaker (for cast iron) by Walter Tools

The VNMA160408-RK5 WKK20S is a rhombic turning insert engineered for productive finishing and medium-heavy roughing of cast iron components in industrial turning operations.

• Tiger·tec Silver coating for long tool life
• Optimised RK5 chipbreaker for cast iron
• 0° negative rake for stable cutting
• Rhombic 35° shape with 0.8 mm corner radius

Consistent productivity through engineered coating and grade

The combination of the Tiger·tec Silver coating with a coated carbide grade provides a balance of thermal stability and wear resistance suited to abrasive cast iron machining. The applied surface treatment reduces flank wear and supports higher cutting speeds compared with uncoated alternatives, which results in high productivity and longer tool life. The insert’s composition is tailored to manage the inherently abrasive chips from grey and nodular cast irons, maintaining cutting edge integrity over extended cycles.

Geometry that reduces downtime and improves process stability

The rhombic 35° shape and 0° negative rake produce a robust cutting geometry that tolerates interrupted cuts and variable chip loads common in cast iron workpieces. The 0.8 mm corner radius helps to distribute cutting forces and reduce edge chipping, delivering consistent dimensional results. Combined with the RK5 chipbreaker, this geometry yields controlled, short chips that evacuate reliably from the cutting zone, reducing the need for manual chip intervention and minimising machine downtime.

Application-focused design for cast iron machining

Designed specifically for the machining of cast iron, the insert’s RK5 chip control and coating chemistry target the short, brittle chips characteristic of these alloys. The grade’s formulation copes with abrasive constituents found in grey cast iron, while the coating assists in preventing premature flank wear. This makes the insert a fitting choice for production environments aiming for repeatable surface finish and predictable tool-change intervals.

Efficient integration into industrial turning processes

The insert’s standard size and form factor allow compatibility with a wide range of clamping systems and toolholders used in turning centres. Its wear characteristics and chip behaviour support predictable tool-life planning and process optimisation in series production. For machining strategies that prioritise process security and steady outputs, this solution contributes to measurable improvements in throughput and component quality.

Discuss application details with Metav Werkzeuge — call +49 2822 7131930 or email info@metav-werkzeuge.com for tailored recommendations based on the Tiger·tec Silver grade

Technical Data

• SKU: VNMA160408-RK5-WKK20S-WALTER
• Article designation: VNMA160408-RK5 WKK20S
• Product type: Drehwendeschneidplatte (turning insert)
• Manufacturer: Walter Tools
• Series: Tiger·tec Silver
• Grade: WKK20S

Data

• Size: 16
• Thickness: 04
• Corner radius: 0.8 mm
• Relief angle: 0° (negative)
• Plate shape: Rhombus 35°
• Tolerance class: M

Special features

• Coating technology: Tiger·tec Silver
• Carbide type: coated carbide
• Chipbreaker: RK5
• Suitable for: cast iron
• Execution: A

FAQ

What materials is this insert primarily intended for?
The VNMA160408-RK5 WKK20S insert from Walter Tools is designed primarily for machining cast iron, with the grade and chipbreaker tuned to handle abrasive and short-breaking chips.

How does the RK5 chipbreaker affect machining performance?
The RK5 chipbreaker produces controlled, short chips that evacuate reliably during turning, which improves process stability and reduces the risk of chip entanglement when using the VNMA160408-RK5 WKK20S.

What advantages does the Tiger·tec Silver coating offer?
The Tiger·tec Silver coating increases thermal resistance and wear protection, enabling more consistent tool life and higher cutting speeds in cast iron applications with the Walter Tools insert.

Why is the 0° negative rake important for this insert?
The 0° negative rake provides a stronger cutting edge and greater resistance to edge chipping under interrupted or heavy cuts, making the geometry of this insert suitable for demanding cast iron turning tasks.

Can this insert be used for finishing and roughing operations?
Yes, the combination of the insert’s geometry, corner radius and coating allows it to be used effectively for both finishing and medium-heavy roughing in cast iron machining.

Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen, Germany

Brand names and protected trade marks (including Walter Tools) are mentioned for explanatory purposes only. Protected trademarks and trade names remain the property of their respective owners. There is no connection between our company and the named brands. The offered item is an original, factory-new product of the manufacturer.