DCMT11T312-RK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver coating and the WKK20S carbide grade for consistent chip control and long edge life in cast iron turning; order the inserts directly via Metav Werkzeuge or consult our technical team for process matching.

DCMT11T312-RK4 WKK20S turning insert – Tiger·tec Silver, cast iron application (Walter Tools)

DCMT11T312-RK4 WKK20S is a rhombic 55° turning insert designed for productive machining of cast iron components, featuring the RK4 chipbreaker and a 1.2 mm corner radius.

• High wear resistance with Tiger·tec Silver
• Optimised for cast iron machining
• RK4 chipbreaker for stable chips
• Rhombus 55° geometry for versatile turning

Consistent performance for abrasive cast iron workpieces

The coated carbide grade WKK20S, presented as part of the Tiger·tec Silver series, delivers a predictable wear pattern that benefits long production runs on cast iron. As a coated carbide alloy tuned for abrasive materials, the insert offers a balance between toughness and hardness, which reduces unexpected tool changes and improves cycle stability. The RK4 chipbreaker is tailored to the breaking behaviour typical of grey and nodular cast irons, promoting short, controllable chips and lowering the risk of surface damage or interrupted cuts.

Durable edge life and process security

A combination of the Tiger·tec Silver coating and the substrate chemistry in WKK20S enhances thermal stability and helps maintain a sharp cutting edge under intermittent contact and high abrasion. The 1.2 mm corner radius contributes to robust edge support, reducing micro-chipping on interrupted surfaces and extending usable life compared with smaller radii. This results in fewer regrinds and improved uptime, making the insert economical for batch production and long turning cycles.

Geometry designed for flexibility and surface quality

The rhombic 55° shape enables versatile turning operations, from longitudinal cuts to light profiling, while the 7° free cutting angle supports stable engagement and favourable cutting forces. The insert thickness (T3) and the specified form ensure consistent seat contact and stable clamping in standard toolholders, which improves the reproducibility of machined parts. Such geometry choices help maintain dimensional accuracy and contribute to a consistent surface finish on cast iron components.

Practical machining benefits and application guidance

When used in standard steel-bodied turning tools with the correct clamping, the insert performs well in medium to heavy finishing operations on cast iron. The RK4 chip control reduces the need for elaborate chip evacuation, simplifying machining setups. For best results, pair this insert with moderate cutting speeds appropriate for cast iron and consider a rigid workholding arrangement to leverage the insert’s wear resistance and edge stability; the net effect is improved process reliability and reduced production costs per part.

For process-specific advice on integrating the Walter Tools WKK20S inserts into a production line, or to request matched recommendations for toolholders and parameters, contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 — our specialists assist with tool selection and application optimisation.

Technical data

• SKU: DCMT11T312-RK4-WKK20S-WALTER
• Article: DCMT11T312-RK4 WKK20S
• Manufacturer: Walter Tools

Facts

• Size: 11 mm
• Corner radius: 1.2 mm
• Free angle: 7°
• Plate thickness: T3
• Geometry: Rhombus 55°
• Tolerance class: M

Special features

• Coating: Tiger·tec Silver
• Carbide type: coated carbide
• Chipbreaker: RK4
• Series: Tiger·tec Silver
• Application: cast iron

FAQ

What materials is this insert intended for?
The insert is designed primarily for cast iron machining; the WKK20S grade and Tiger·tec Silver coating are optimised for the abrasive wear and chip characteristics of cast iron.

Does the insert provide good chip control for interrupted cuts?
Yes, the RK4 chipbreaker and the 1.2 mm corner radius promote stable chip formation and edge robustness, aiding performance on interrupted surfaces.

Which toolholder types are compatible with the insert form?
Standard turning toolholders that accept rhombic 55° indexable inserts are compatible; ensure the clamping seat matches the DCMT form for secure engagement and repeatability.

Is the DCMT11T312-RK4 WKK20S suitable for finishing passes?
The geometry and coating support medium finishing operations on cast iron; for final surface integrity, use appropriate feed and speed settings tailored to the workpiece and machine rigidity.

What is the SKU for ordering or referencing in machining documentation?
Order or reference SKU DCMT11T312-RK4-WKK20S-WALTER when specifying this Walter Tools turning insert in procurement or process sheets.

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