CCMT120408-MW4 WKK20S WKK20S Wendeplatten - Walter Tools

A durable combination of Tiger·tec Silver coating and the WKK20S grade delivers reliable wear resistance and stable chip formation when machining cast iron; the Rhombic 80° geometry with a 0.8 mm nose radius and MW4 chipbreaker ensures consistent surface finish and controlled chips. Order the inserts directly via Metav Werkzeuge or contact their consultants for tailored machining recommendations.

CCMT120408-MW4 WKK20S — Drehwendeschneidplatte for cast iron by Walter Tools

A CCMT120408-MW4 WKK20S is a turning insert designed for productive machining of cast iron, combining a Tiger·tec Silver coated grade with a chipbreaker suited for brittle materials

• Tiger·tec Silver coating for extended tool life
• WKK20S grade optimised for cast iron
• Rhombic 80° insert with 0.8 mm nose radius
• MW4 chipbreaker for secure chip control

Longer tool life and consistent wear resistance for cast-iron turning

The Tiger·tec Silver coating and the WKK20S grade form a wear-resistant system that is tailored to the abrasive nature of cast iron. The coated carbide construction reduces flank and crater wear during interrupted cuts and abrasive conditions, which translates into fewer tool changes and more productive machining cycles. This technical combination supports stable cutting edges and predictable tool life, so process planners can rely on consistent component quality and reduced downtime.

Precise chip control and surface quality through geometry

The Rhombic 80° geometry together with the MW4 chipbreaker is engineered to produce short, controllable chips typical for cast-iron machining, improving evacuation and reducing the risk of built-up edge. The 0.8 mm nose radius contributes to a balance between strength and surface finish, enabling repeatable dimensions and a reliable workpiece appearance. The 7° relief angle helps to reduce rubbing on the flank, lowering cutting forces and supporting dimensional stability in serial production.

Application scope, mounting and machining benefits

Designed specifically for cast iron applications, the insert is categorised under the Tiger·tec Silver series and carries tolerance class M, making it suitable for standard turning operations where reproducible results are required. The insert designation and format are compatible with common CCMT clamping systems; the MW4 chipbreaker simplifies process setup by delivering consistent chip shapes across varying depths of cut. For workshops seeking straightforward integration, this insert supports a cost-effective balance of productivity and surface integrity.

For machining cast iron with reliable tool life and reproducible chip control, consult Metav Werkzeuge’s specialists or request application advice from Metav Werkzeuge at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• SKU: CCMT120408-MW4-WKK20S-WALTER
• Designation: CCMT120408-MW4 WKK20S
• Manufacturer: Walter Tools
• Product type: Drehwendeschneidplatte
• Series: Tiger·tec Silver

Facts

• Insert shape: Rhombic 80°
• Relief angle: 7°
• Nose radius: 0.8 mm
• Size code: 12
• Thickness code: 04
• Tolerance class: M

Special features

• Grade: WKK20S
• Coating: Tiger·tec Silver (coated carbide)
• Chipbreaker: MW4
• Suitable for: cast iron
• Execution: T

FAQ

What materials is this insert optimised for?
The CCMT120408-MW4 WKK20S is optimised for machining cast iron, with the WKK20S grade and Tiger·tec Silver coating tuned to abrasive and brittle chip behaviour.

How does the MW4 chipbreaker affect machining performance?
The MW4 chipbreaker on this Walter Tools insert produces short, manageable chips and improves chip evacuation, which helps maintain surface quality and reduces interruption risk in cast-iron turning.

Is the insert suitable for finishing cuts?
Yes; the 0.8 mm nose radius and Rhombic 80° geometry support good surface finish and dimensional control when used within appropriate feed and speed ranges for cast iron.

What does the tolerance class M indicate?
Tolerance class M indicates standard dimensional accuracy for the insert, ensuring compatible seating and repeatability in common CCMT toolholders.

Can this insert be used in interrupted cuts or roughing operations?
The wear-resistant Tiger·tec Silver coating and the robust WKK20S grade provide enhanced edge stability, making the insert suitable for both intermittent cutting and productive roughing in cast-iron applications.

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

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