SNMA120412-RK5 WKK20S WKK20S Wendeplatten - Walter Tools

Benefit from the combination of Tiger·tec Silver wear resistance and reliable chip control from the RK5 chipbreaker, optimised for productive cast-iron turning; order the insert directly via Metav Werkzeuge or request application advice from our consultants.

SNMA120412-RK5 WKK20S indexable turning insert – RK5 chipbreaker, Tiger·tec Silver (Walter Tools)

The SNMA120412-RK5 WKK20S is a square 90° indexable turning insert with a 1.2 mm corner radius, engineered for robust, high‑efficiency machining of cast iron components

• Tiger·tec Silver coating for wear resistance
• Designed for abrasive cast iron machining
• RK5 chipbreaker for controlled chip flow
• Square 90° form with 1.2 mm corner radius

Optimised for productive cast-iron turning

The grade is part of the Tiger·tec Silver series and is formulated as a coated carbide solution specifically for the K workpiece group (cast iron). This composition addresses abrasive wear and the typically short, brittle chips of cast iron, delivering longer tool life and consistent removal rates. The combination of substrate and coating improves process stability, so fewer tool changes are required and cycle times remain predictable.

Coating and grade: extended life and consistent results

The WKK20S grade brings a balance of hardness and toughness that suits demanding foundry work. The coating reduces flank and crater wear under intermittent loading and thermal fluctuations common in grey and nodular cast irons. For production environments, this translates into reduced downtime and more repeatable surface quality, with a clear advantage when components require tight dimensional tolerances.

Geometry and chip control for reliable machining

A square 90° insert geometry provides generous support for heavy cuts and stable seating in a variety of toolholders. The RK5 chipbreaker is tailored to produce predictable, short chips in cast-iron machining, improving swarf evacuation and reducing the risk of tool nose damage. The negative 0° rake geometry adds cutting edge strength, which is beneficial in interrupted cuts and heavy feed applications, ensuring robustness when machining complex cast-iron parts.

Practical features that aid shop-floor performance

The insert size (12) with a plate thickness of 04 and a 1.2 mm corner radius offers a compromise between edge strength and dimensional flexibility for finishing and semi-finishing passes. The tolerance class M ensures consistent interchangeability across indexable tooling systems. Together, these design choices focus on delivering dependable performance in medium- to high-volume turning operations, supporting machinists and process engineers in achieving stable, economical production.

For tailored recommendations on Walter Tools Tiger·tec Silver grades and suitability for specific cast-iron applications, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930.

Technical Data

• SKU: SNMA120412-RK5-WKK20S-WALTER
• Label: Drehwendeschneidplatte SNMA120412-RK5 WKK20S Walter Tools
• Manufacturer: Walter Tools
• Product type: indexable turning insert

Facts

• Insert size: 12
• Thickness: 04
• Corner radius: 1.2 mm
• Rake angle: 0° (negative)
• Tolerance class: M

Special features

• Series: Tiger·tec Silver
• Grade: WKK20S
• Coating: Tiger·tec Silver (coated carbide)
• Chipbreaker: RK5
• Form: square 90°
• Material group suitability: cast iron (K)

FAQ

What materials is this insert intended for?
The SNMA120412-RK5 WKK20S by Walter Tools is formulated for machining cast iron (K), optimised for abrasive wear and short-chip behaviour typical of those materials.

How does the RK5 chipbreaker affect chip formation?
The RK5 chipbreaker on the SNMA120412-RK5 promotes short, controlled chips during cast-iron turning, improving swarf control and reducing risk to the tool and workpiece.

What benefits does the Tiger·tec Silver coating provide?
The Tiger·tec Silver coating on the WKK20S grade increases wear resistance and thermal stability, extending tool life and maintaining consistent surface finish in serial production.

Is this insert suitable for interrupted cuts or heavy roughing?
Yes; the square 90° form combined with a negative 0° rake and a 1.2 mm corner radius provides edge strength suitable for interrupted cuts and robust roughing operations.

Which SKU should be ordered for this specification?
Order SKU SNMA120412-RK5-WKK20S-WALTER for the described configuration of the Walter Tools indexable turning insert.

Manufacturer: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen; Germany

Protected trademarks and trade names are the property of their respective owners. Brand names and protected product names are mentioned for explanatory purposes only. There is no connection between our company and the listed brands. The offered item is an original, brand‑new product of the manufacturer.