DNMG150612-MK5 WKK20S Wendeplatten - Walter Tools

Benefit from the combination of the Tiger‑tec Silver coating, the MK5 chipbreaker and the rhombic 55° geometry for efficient, repeatable machining of cast iron; the insert offers stable edge life and controlled chip behaviour. Order the DNMG150612-MK5 WKK20S directly via Metav Werkzeuge or consult our advisors for application-specific recommendations.

DNMG150612-MK5 WKK20S indexable turning insert — Tiger‑tec Silver for cast iron (Walter Tools)

A DNMG150612-MK5 WKK20S indexable turning insert engineered for productive machining of cast iron, combining a coated carbide grade with a MK5 chipbreaker and a 55° rhombic form

• Tiger‑tec Silver coating for wear resistance
• MK5 chipbreaker for short, controlled chips
• Rhombic 55° geometry for versatile turning
• 1.2 mm corner radius for stable cutting edge

High productivity through tailored grade and coating

The combination of the Tiger‑tec Silver coating and the WKK20S grade delivers a balance between wear resistance and toughness that is particularly suited to the abrasive nature of cast iron (ISO group K). Because the grade is a coated carbide, the insert resists abrasive wear while maintaining a stable cutting edge under typical interrupted cuts and hard inclusions found in grey and nodular castings. This results in longer tool life and fewer indexings, supporting continuous production and reducing tool-change downtime.

Controlled chip formation and secure edge support

The MK5 chipbreaker is designed for producing short, breaking chips when turning brittle materials; this creates predictable chip flow and reduces the risk of chip entanglement. Combined with the 1.2 mm corner radius and the 0° negative relief, the geometry provides robust edge support for heavy cuts and repeated use. The result is improved process security during medium- to heavy-duty operations, with consistent workpiece surface quality and fewer scrap parts.

Geometry and versatility for machining strategies

The rhombic 55° insert form offers versatility across common turning tasks: it permits effective approach angles for both roughing and semi-finishing operations while enabling economical use of the insert across several toolholders. The shape and tolerance class M support dimensional consistency, and the thickness and size coding enable straightforward tool selection within standard DNMG configurations. This makes the grade a practical choice for batch production and fluctuating workpiece mixes.

Practical application guidance and machine compatibility

As a coated indexable insert for cast-iron applications, the component suits lathes and automatic turning centres where chip control and tool life are priorities. The coated carbide construction is compatible with conventional coolant strategies; however, machining parameters must be selected according to the workpiece grade and machine rigidity to maximise the benefits of the Tiger‑tec Silver technology. Integration into existing tooling systems is straightforward thanks to the widely used DNMG format and the MK5 chipbreaker variant.

Contact Metav Werkzeuge for tailored cutting data and order information for this Walter Tools indexable insert, DNMG150612-MK5 WKK20S, to ensure optimal setup for production environments

Technical data

• Article number: DNMG150612-MK5-WKK20S-WALTER
• Product: Drehwendeschneidplatte
• Brand: Walter Tools
• Grade: WKK20S
• Series: Tiger‑tec Silver

Core measurements

• Insert size: 15
• Thickness code: 06
• Corner radius: 1.2 mm
• Relief angle: 0° (negative)
• Geometry: Rhombic 55°

Materials & features

• Coating: Tiger‑tec Silver (coated carbide)
• Chipbreaker: MK5
• Tolerance class: M
• Application: Cast iron (ISO group K)

FAQ

What materials is this insert intended for?
The DNMG150612-MK5 WKK20S is specified for cast iron (ISO group K) and its WKK20S grade is tuned to resist abrasive wear typical of such materials.

How does the MK5 chipbreaker affect chip control?
The MK5 chipbreaker generates short, broken chips with brittle materials, improving chip evacuation and reducing interference with the machining process when using the Walter Tools insert.

Is the coated grade suitable for interrupted cuts and hard inclusions?
Yes, the Tiger‑tec Silver coating combined with the WKK20S grade provides enhanced edge life and toughness, which helps to maintain performance under interrupted cutting conditions.

Can this insert be used for both roughing and finishing operations?
The rhombic 55° geometry and the 1.2 mm corner radius allow flexible use across roughing and semi-finishing tasks, offering a good compromise between stability and surface quality.

What does the 0° negative relief mean for cutting performance?
A 0° negative relief increases edge strength and supports heavier feed and depth-of-cut settings, leading to greater process security when machining challenging cast-iron components.

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

The Walter AG (marketed as Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Sandvik Group. Protected trademarks and product names are the property of their respective owners and are mentioned for explanatory purposes only. There is no affiliation between our company and the mentioned brands. The offered article is an original, factory-new product of the manufacturer.