CNMG120412-MW5 WKK20S Wendeplatten - Walter Tools

High abrasion resistance and reliable chip control make this insert a strong choice for productive cast‑iron turning; the Tiger‑tec Silver coating and MW5 chipbreaker combine to reduce tool changes and maintain surface quality — order the insert directly via Metav Werkzeuge or contact our consultants for tailored advice.

CNMG120412-MW5 WKK20S – Walter Tools turning insert, Tiger‑tec Silver, MW5, for cast iron

The CNMG120412-MW5 WKK20S is a rhombic 80° indexable turning insert designed for efficient machining of cast iron components in industrial production.

• Tiger‑tec Silver coated grade WKK20S
• Optimised MW5 chipbreaker for cast iron
• Rhombic 80° geometry for stable cuts
• 0° negative rake for robust cutting

High wear resistance tailored to cast‑iron machining

The Tiger‑tec Silver coating and the WKK20S grade provide a coated carbide solution optimised for abrasive cast‑iron workpieces. The composition is tuned to resist the high abrasive wear typical of grey and ductile cast iron, enabling longer periods between index changes. This results in consistent edge life and fewer unscheduled stoppages in production, supporting higher uptime and predictable process planning.

Reliable chip control for uninterrupted productivity

The integrated MW5 chipbreaker and the rhombic 80° geometry deliver controlled, short breaking chips that are typical when cutting cast iron. Combined with the 0° (negative) relief, this geometry provides a stable cutting engagement that reduces vibration and promotes repeatable surface finishes. The 1.2 corner radius contributes to strength at the cutting edge, making the insert suitable for moderate depth‑of‑cut operations where chip control and tool security matter.

Robust design that reduces tooling-related downtime

A solid, negative‑rake geometry and a wear‑resistant grade minimise edge chipping and flank wear under intermittent or interrupted cuts. The result is a reliable tool life that simplifies inventory management and lowers the frequency of insert changes. By favouring stable chip formation and abrasion resistance, the insert supports leaner tool programmes and reduces cumulative setup time across batches.

Integrates easily into standard turning toolholders and workflows

The rhombic shape and ISO designation make the insert compatible with a wide range of indexable toolholders used in turning operations. Its specification is suitable for programme planners and machine operators seeking a dedicated solution for cast‑iron components that balances surface quality with production economy. For specific machining parameters, Metav Werkzeuge can provide application guidance and recommendations for cutting data.

For cast‑iron turning tasks requiring robust performance with Tiger‑tec Silver, request a tailored recommendation or quotation from Metav Werkzeuge at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical data

• Article number: CNMG120412-MW5-WKK20S-WALTER
• Name: CNMG120412-MW5 WKK20S
• Manufacturer: Walter Tools

Core data

• Insert size: 12
• Corner radius: 1.2
• Thickness code: 04
• Relief angle: 0° (negative)
• Tolerance class: M

Special features

• Series: Tiger‑tec Silver
• Grade: WKK20S (coated carbide)
• Chipbreaker: MW5
• Geometry: Rhombus 80°
• Suitable for: Cast iron
• Design: G

FAQ

What materials is this insert intended for?
The CNMG120412‑MW5 WKK20S from Walter Tools is formulated primarily for cast iron machining; the WKK20S grade and MW5 chipbreaker are matched to the abrasive nature and short‑chip tendency of cast materials.

How does the MW5 chipbreaker improve machining?
The MW5 chipbreaker on this turning insert shapes chips into short, controllable segments, improving process stability and helping to maintain consistent surface finish during cast‑iron turning.

Can the insert be used with standard CNMG toolholders?
Yes, the rhombic 80° form and ISO designation mean the insert fits conventional CNMG‑compatible toolholders designed for indexable turning inserts.

What advantage does the 0° negative rake provide?
A 0° negative rake increases edge strength and robustness during interrupted cuts and heavy engagement, reducing the risk of chipping when machining cast iron.

Is the WKK20S grade coated or uncoated?
The WKK20S is a coated carbide grade within the Tiger‑tec Silver series, offering enhanced abrasion resistance tailored to cast‑iron applications.

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

The Walter AG (brand appearance: Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking. Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanatory purposes only. There is no affiliation between our company and the mentioned brands. The offered item is an original, factory‑new product of the manufacturer.