SNMA150616-RK7 WKK20S Wendeplatten - Walter Tools

Combining the WKK20S coated‑carbide grade with the RK7 chipbreaker provides stable chip formation and consistent wear behaviour, optimising cycle times for cast iron machining. The square 90° insert with a 1.6 mm corner radius and 0° (negative) rake offers reproducible cutting performance; order the insert via Metav Werkzeuge or request application advice from the consultants.

SNMA150616-RK7 WKK20S — Indexable Turning Insert for Cast Iron (Tiger‑tec Silver) by Walter Tools

SNMA150616-RK7 WKK20S is a coated indexable turning insert designed for efficient machining of cast iron components in industrial turning applications

• Tiger‑tec Silver coated technology
• Optimised for cast iron (ISO group K)
• RK7 chipbreaker for controlled chip formation
• Square 90° form with 1.6 mm corner radius

Maximise material removal and tool life with Tiger‑tec Silver

The combination of Tiger‑tec Silver coating and the WKK20S grade means the insert is engineered to withstand abrasive wear typical of cast iron. The substrate is a coated carbide, delivering higher resistance to flank and crater wear under interrupted cutting and elevated temperatures. The integrated RK7 chipbreaker improves chip control for short, brittle chips typical of grey and nodular cast iron, which reduces the risk of recut material and tool damage. This results in a more predictable process, fewer tool changes and improved overall productivity.

Accurate geometry for repeatable turning results

A square 90° shape with a 1.6 mm corner radius provides a robust cutting edge for both roughing and semi‑finishing operations. The 0° (negative) free angle and the declared tolerance class M ensure stable cutting behaviour and secure seat stability in the toolholder. These geometric choices translate into reproducible component dimensions and consistent surface quality, while the square form supports multiple indexings per insert for cost‑effective tool usage. The design reduces vibration and offers a good balance between edge strength and accessibility in tight turning profiles.

Application focus and operational benefits in cast iron machining

This insert is specified for machining cast iron (ISO group K), where chip brittleness and abrasive constituents demand tailored grades. The WKK20S grade targets those demands by combining wear resistance with sufficient toughness for reliable edge life. The result is reduced downtime, fewer insert indexes and lower process variability. As a product from Walter Tools, the insert benefits from established development in chip control and consistent tool life, aiding manufacturers seeking predictable machining cycles and improved process stability.

For machining recommendations or to confirm suitability for specific cast iron grades, contact Metav Werkzeuge for tailored advice and ordering information (info@metav-werkzeuge.com, +49 2822 7131930)

Technical data

• Article number: SNMA150616-RK7-WKK20S-WALTER
• Article designation: SNMA150616-RK7 WKK20S
• Manufacturer: Walter Tools

Facts

• Corner radius: 1.6 mm
• Plate size: 15 mm
• Free angle: 0° (negative)
• Plate thickness: 06
• Tolerance class: M

Special features

• Series: Tiger‑tec Silver
• Grade: WKK20S (coated carbide)
• Chipbreaker: RK7
• Plate form: Square 90°
• Version: A
• Material application: Cast iron (ISO group K)

FAQ

What materials is this insert suitable for?
The SNMA150616-RK7 WKK20S is optimised for cast iron (ISO group K) machining, offering abrasion resistance and chip control for brittle cast materials.

How does the RK7 chipbreaker affect chip formation?
The RK7 chipbreaker produces short, controllable chips in cast iron, improving evacuation and reducing the chance of recutting.

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 under aggressive cutting conditions.

Is the insert suitable for finishing operations?
With its 1.6 mm corner radius and robust geometry, the insert can be used for semi‑finishing and certain finishing tasks where edge strength and reproducible results are required.

Which insert features support process stability?
The square 90° form, 0° (negative) rake and tolerance class M ensure stable seating and repeatable cutting performance, supporting consistent cycle times.

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