SCMT120408-RK4 WKK20S Wendeplatten - Walter Tools

Combining the Tiger‑tec Silver coating with the WKK20S grade and an RK4 chipbreaker delivers controlled chips and extended edge life when machining cast iron; this supports stable, productive turning and drilling operations. Order directly via Metav Werkzeuge or consult our technical team for cutting data and batch supply.

SCMT120408-RK4 WKK20S — Drilling and turning indexable insert with Tiger‑tec Silver | Walter Tools

The SCMT120408-RK4 WKK20S is a square 90° indexable insert engineered for productive machining of cast iron in turning and drilling applications.

• Tiger‑tec Silver coating
• WKK20S grade for cast iron
• RK4 chipbreaker for chip control
• Square 90° form, 0.8 mm corner radius

Stable performance on abrasive cast iron for predictable productivity

The combination of Tiger‑tec Silver coating and the WKK20S carbide grade is optimised for abrasive cast iron workpieces. The coating reduces adhesion and thermal load while the grade balances hardness and toughness for repetitive cutting operations. As a result, the insert offers consistent cutting edge life and reduced flank wear under the short, brittle chip conditions typical of cast iron. For production environments this translates into fewer tool changes and more predictable cycle times.

Controlled chips and reliable surface quality through geometry

The RK4 chipbreaker is designed to generate short, segmented chips when machining grey and nodular cast irons, improving evacuation and reducing entanglement risk. A 0.8 mm corner radius and 7° clearance create a robust cutting edge that tolerates interrupted cuts and variability in feed, while the square 90° form permits stable tangential engagement for facing and shoulder turning. This geometry supports improved surface finish and extends edge life, lowering the frequency of insert indexing and the downtime associated with tool handling.

Practical integration for shop-floor efficiency

Designed as a standard indexable insert for both drilling-bore and turning toolholders, the insert integrates into common tool systems without special adjustments. Its specification and consistent manufacturing tolerance class M enable repeatable seating and reliable clamping, which helps maintain process security across shifts. Operators benefit from predictable behaviour and planners gain simpler tooling inventory since the grade is tailored to the cast iron group per ISO guidance. The Walter Tools brand emphasizes reproducible performance and industrial robustness for demanding production tasks.

Contact Metav Werkzeuge for application-specific recommendations, cutting parameters and prompt supply of the SCMT120408-RK4 WKK20S insert optimized for cast iron machining

Technical data

• Article number: SCMT120408-RK4-WKK20S-WALTER
• Designation: SCMT120408-RK4 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver

Core specifications

• Corner radius: 0.8 mm
• Clearance angle: 7°
• Plate form: Square 90°
• Plate size: 12 mm
• Thickness code: 04
• Tolerance class: M

Materials & features

• Product type: Drilling/bore and turning indexable insert
• Grade: WKK20S
• Chipbreaker: RK4
• Applicable material: Cast iron (K)
• Coating: Tiger‑tec Silver
• Execution: T

FAQ

Which materials is this insert suited for?
This insert is specified for cast iron applications; the WKK20S grade and Tiger‑tec Silver coating are tailored for the abrasion and chip characteristics of cast iron.

What does the RK4 chipbreaker provide in practice?
The RK4 chipbreaker promotes short, controllable chips and improves chip evacuation, enhancing safety and reducing interruptions during cast iron turning and boring.

How does the corner radius affect operation?
A 0.8 mm corner radius increases edge robustness for interrupted cuts and contributes to improved surface integrity and longer tool life in abrasive cast iron operations.

Is the SCMT120408-RK4 WKK20S compatible with standard toolholders?
Yes, the insert follows standard square 90° geometry and tolerance class M, enabling repeatable seating in conventional drilling and turning tool-holders designed for this insert form.

Manufacturer/Responsible: 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 trademarks are cited for explanatory purposes only and do not indicate any affiliation with our company. The offered article is an original, factory‑new product of the manufacturer.