SNMA120416-RK7 WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of the Tiger·tec Silver coating and the RK7 chipbreaker for consistent chip control when machining cast iron; the square 90° geometry with a corner radius of 1.6 mm provides robust edge strength and reliable performance. Order the SNMA120416-RK7 WKK20S insert directly via Metav Werkzeuge or consult Metav’s advisors for application-specific recommendations.

SNMA120416-RK7 WKK20S – Turning indexable insert by Walter Tools, Tiger·tec Silver, RK7 chipbreaker

A SNMA120416-RK7 WKK20S turning indexable insert designed for productive cast iron turning, combining a coated carbide grade with a negative 0° clearance to control brittle, breaking chips.

Tiger·tec Silver coating for extended life
Square 90° plate with 1.6 mm corner radius
Optimised for cast iron machining (K group)

Reliable chip control for cast iron turning

The insert offers stable chip formation through its RK7 chipbreaker, specifically tuned for abrasive, breakable chips typical of cast iron. The coated carbide grade provides consistent performance in intermittent contact and brittle-chip scenarios, reducing the risk of built-up edge and unexpected tool failure. Operators benefit from improved process reliability and fewer interruptions during roughing and semi-finishing operations, which supports a steadier production flow and predictable part quality.

Coating and grade engineered for longevity

With the Tiger·tec Silver technology and the WKK20S grade, the cutting edge exhibits enhanced wear resistance and thermal stability. The coating strategy reduces flank wear and preserves edge geometry over longer cutting periods, translating into extended tool life and lower tool-change frequency. For production environments where changeover time is costly, this means fewer stoppages and more consistent component tolerances over a series run.

Geometry that combines strength and versatility

The 90° square shape and corner radius 1.6 mm produce a robust cutting edge suited to heavy engagement and interrupted cuts. The negative 0° clearance geometry supports secure clamping and stable cutting forces, which is advantageous when working with casting irregularities. The plate thickness and form are compatible with standard ISO toolholders for square inserts, enabling straightforward integration into existing turning setups and straightforward indexability for economical use of all cutting corners.

Clear application fit and operational advantage

Designed for the ISO K workpiece group, the insert is intended for a broad range of cast-iron grades where wear resistance and controlled chip breaking are priorities. The combination of coating, grade and chipbreaker leads to a balanced performance: robust enough for heavier cuts yet controlled enough to produce acceptable surface quality in follow-up operations. For workshops seeking repeatable results on cast-iron components, this insert supports productive machining with reduced tool management overhead.

For reliable cast-iron turning with Walter Tools' Tiger·tec Silver inserts, contact Metav Werkzeuge for tailored technical advice and prompt supply via info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: SNMA120416-RK7-WKK20S-WALTER
• Designation: SNMA120416-RK7 WKK20S
• Product type: Turning indexable insert (turning insert)
• Brand: Walter Tools
• Series: Tiger·tec Silver
• Grade: WKK20S
• Chipbreaker: RK7

Facts

• Plate size: 12 mm
• Thickness: 4 mm
• Corner radius: 1.6 mm
• Shape: Square 90°
• Clearance angle: 0° (negative)
• Tolerance class: M

Applications & features

• Coating: Tiger·tec Silver
• Material: Coated carbide (WKK20S)
• Suitable for: Cast iron (ISO group K)
• Chip control: RK7 chipbreaker
• Geometry: Square insert, negative rake
• Series attributes: Stable chip formation, productive machining

FAQ

What materials is this insert intended for?
The SNMA120416-RK7 WKK20S insert from Walter Tools is optimised for cast iron (ISO group K), matching the grade and chipbreaker to abrasive, short-chipping materials.

What coating and grade does the insert use?
This turning insert features Tiger·tec Silver coating and the WKK20S coated carbide grade, chosen to improve wear resistance and thermal stability in cast-iron turning.

What are the key geometric specifications of the insert?
The plate is a 90° square insert with a corner radius of 1.6 mm, a thickness of 4 mm and a negative 0° clearance, combined with an RK7 chipbreaker for controlled chips.

Can this insert be used for roughing operations?
Yes, the robust geometry and wear-resistant grade make the SNMA120416-RK7 WKK20S suitable for roughing and semi-finishing where chip control and edge strength are needed.

Is the insert indexable and easy to replace?
The SNMA120416-RK7 WKK20S is an indexable turning insert designed for standard square insert toolholders, enabling economical use of multiple cutting corners through simple indexing.

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

Protected trademarks and product names are the property of their respective owners. Brand names and protected product designations are mentioned for clarification only. There is no affiliation between our company and the named brands. The offered item is an original, brand-new product from the manufacturer (Walter Tools).