VBMT160412-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of productive machining performance and reliable chip control for efficient finishing of cast iron components; the coated carbide grade and robust edge geometry ensure consistent tool life and surface quality. Order the insert directly via Metav Werkzeuge or contact our consultants for application advice.

VBMT160412-MK4 WKK20S — Indexable turning insert for cast iron, Tiger‑tec Silver (Walter Tools)

A VBMT160412-MK4 WKK20S indexable turning insert engineered for productive and stable machining of cast iron components in series production.

• Tiger‑tec Silver coating for extended tool life
• Optimised for cast iron (ISO K) machining
• Rhombic 35° form for versatile turning
• 1.2 mm corner radius for a robust cutting edge

Enhanced productivity through coating and grade

The combination of the Tiger‑tec Silver coating and the WKK20S coated carbide grade is tuned specifically for cast iron applications. This pairing reduces abrasive wear and extends useful life under the short, brittle chip conditions typical for grey and nodular cast irons. The integrated MK4 chipbreaker improves chip control, which reduces interruptions and the need for manual chip handling. As a result, cycle times become more predictable and tool-change frequency is reduced, contributing directly to process efficiency and a lower cost per component.

Geometry that balances strength and versatility

The insert’s rhombic 35° geometry and the modest 5° relief angle enable flexible approach angles, allowing a balance between light finishing cuts and more robust roughing operations. The 1.2 mm corner radius provides a reinforced cutting edge that tolerates intermittent cuts and variable depths of cut without rapid edge breakdown, leading to a steadier surface finish on machined parts. The plate designation and execution reflect a standard industrial format for seamless toolholder compatibility in turning applications, supporting fast integration into existing tool sets.

Application focus and selection guidance

Designed for the ISO K material class, this indexable insert is particularly suited to common cast iron turning tasks where abrasive wear and short, breaking chips predominate. The coated carbide substrate and optimised chip geometry aim to deliver consistent results across a broad range of cast iron grades. For production environments seeking stable process windows and repeatable surface quality, the insert represents a practical choice. If additional machining data or cutting parameter recommendations are required, Metav Werkzeuge provides technical guidance to match the insert to specific machines and cycle strategies.

Contact Metav Werkzeuge for tailored application support or to check availability of the VBMT160412-MK4 WKK20S insert and compatible toolholders

Technical Data

• Article number: VBMT160412-MK4-WKK20S-WALTER
• Designation: VBMT160412-MK4 WKK20S
• Product type: Indexable turning insert / Drehwendeschneidplatte
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver

Facts

• Size: 16
• Thickness: 04
• Corner radius: 1.2 mm
• Relief angle: 5°
• Tolerance class: M

Special features

• MK4 chipbreaker
• Coated carbide grade WKK20S
• Suited for cast iron (ISO K)
• Form: Rhombus 35°
• Execution: T

FAQ

What materials is this insert intended to machine?
The VBMT160412-MK4 WKK20S insert is specified for machining cast iron (ISO K); the WKK20S grade and Tiger‑tec Silver coating are optimised for abrasive, short-chipping cast iron conditions.

How does the MK4 chipbreaker impact performance?
The MK4 chipbreaker promotes controlled short-chip formation in cast iron, improving chip evacuation and reducing the likelihood of chip entanglement during turning operations.

Can this insert be used for finishing and roughing?
Yes, the rhombic 35° geometry and the 1.2 mm corner radius allow the insert to be applied across a range of depths of cut, offering versatility for light finishing and more robust turning passes.

What benefits does the Tiger‑tec Silver coating provide?
The Tiger‑tec Silver coating enhances wear resistance under abrasive conditions, translating into longer tool life and more consistent surface quality on cast iron components.

Which product designation should be ordered to match this insert?
Order the VBMT160412-MK4 WKK20S indexable insert; for toolholder compatibility check the insert geometry VBMT160412-MK4 and the MK4 chipbreaker specification.

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

The Walter AG (marketed as Walter Tools) is one of the world’s leading manufacturers of precision tooling for metalworking and forms part of the Sandvik Group. Protected trademarks and trade names remain the property of their respective owners. Product names and trademarks are used for clarification only. The offered item is an original, factory-new product of the manufacturer.