DNMG110412-MK5 WKK20S Wendeplatten - Walter Tools

The combination of a Tiger‑tec Silver coating and the WKK20S grade ensures productive, wear‑resistant cutting in abrasive cast iron applications; the robust negative relief and a 1.2 mm corner radius support repeatable edge life and machining stability. Order the insert directly via Metav Werkzeuge or consult our application specialists for process optimisation.

DNMG110412-MK5 WKK20S indexable turning insert — for cast iron machining, Walter Tools

An DNMG110412-MK5 WKK20S indexable turning insert designed to deliver consistent performance in cast iron turning thanks to Tiger‑tec Silver coated carbide and a dedicated MK5 chipbreaker

• Tiger‑tec Silver coated carbide for longevity
• Optimised for cast iron (ISO K) machining
• Negative relief 0° for robust cutting
• 1.2 mm corner radius for stable edges

Reliable performance for abrasive cast iron work

The insert combines the WKK20S grade with the Tiger‑tec Silver coating to address the abrasive wear typical of cast iron. This pairing reduces flank wear and extends tool life under interrupted or short‑chip turning conditions. By selecting a grade tuned to the material group K (cast iron), the solution reduces unplanned tool changes and supports a more predictable production rhythm, improving machining throughput without sacrificing surface integrity.

Predictable edge behaviour and practical geometry

With a negative relief angle (0°) and a rhombic 55° form, the geometry provides robustness during heavy cuts and feed variations. The 1.2 mm corner radius improves edge stability and load distribution, which helps to avoid premature chipping on interrupted surfaces. The MK5 chipbreaker is engineered to control short, brittle cast‑iron chips, facilitating reliable chip evacuation and reducing the risk of built‑up edge under typical grey and nodular cast iron conditions.

Coating and grade: why they matter for productivity

Tiger‑tec Silver is a multilayer coating technology intended to combine wear resistance with fracture toughness. In practice, this means fewer insert changes and steadier component quality over long series production. The coated carbide base provides the necessary substrate strength for turning operations that encounter abrasive inclusions and variable chip forms commonly found in cast iron workpieces.

Integration into workshop processes

The insert’s DNMG form factor and standard clamping compatibility enable straightforward integration with conventional turning toolholders, keeping setup time minimal. Consistent insert dimensions and the M tolerance class support repeatable seating and re‑indexing, which is especially beneficial for batch production and automated tool‑management systems. Where process reliability is critical, choosing a grade and chipbreaker designed for the work material reduces scrap rates and increases machine uptime.

Contact Metav Werkzeuge for tailored application advice on Walter Tools Tiger‑tec Silver inserts and to discuss optimised cutting parameters for specific cast iron grades — phone +49 2822 7131930 or email info@metav-werkzeuge.com

Technical Data

• SKU: DNMG110412-MK5-WKK20S-WALTER
• Article designation: DNMG110412-MK5 WKK20S
• Manufacturer: Walter Tools
• Product type: Indexable turning insert

Core dimensions

• Inscribed circle / size: 11
• Thickness: 04
• Corner radius: 1.2 mm
• Insert form: Rhombus 55°
• Relief (clearance) angle: 0° (negative)
• Chipbreaker: MK5
• Tolerance class: M

Materials & features

• Grade: WKK20S
• Series/technology: Tiger‑tec Silver
• Substrate: Coated carbide
• Application group: Cast iron (ISO K)
• Execution: G

FAQ

Which materials is this insert intended for?
The DNMG110412-MK5 WKK20S insert is designed primarily for cast iron applications (ISO group K) and performs best on abrasive, breakable chip conditions typical of grey and nodular cast iron.

What benefits does the Tiger‑tec Silver coating provide?
Tiger‑tec Silver on the WKK20S grade improves wear resistance while retaining toughness, resulting in longer tool life and steadier machining performance for Walter Tools coated carbide inserts.

How does the MK5 chipbreaker affect machining?
The MK5 chipbreaker on this insert controls short, brittle chips common in cast iron, promoting reliable chip flow and reducing the likelihood of chip interference during turning operations.

Can this insert be used in interrupted cuts?
Yes, the negative relief (0°) combined with a 1.2 mm corner radius provides a robust cutting edge suited to interrupted machining and variable cutting conditions when using the DNMG110412-MK5 WKK20S insert.

Is the geometry compatible with standard toolholders?
The DNMG form and standard dimensions ensure compatibility with conventional turning toolholders, facilitating straightforward tool swaps and consistent clamping accuracy.

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

The Walter AG (brand: Walter Tools) is part of the Sandvik Group and is recognised as a leading manufacturer of precision tools for metalworking, offering innovative insert grades and coatings for high‑productivity machining. Marked names and trademarks are the property of their respective owners and are mentioned for explanation only; there is no affiliation between Metav Werkzeuge and the named manufacturers.