CNMG120404-MK5 WKK20S Wendeplatten - Walter Tools

Take advantage of the combination of Tiger·tec Silver wear resistance, precise MK5 chip control and a Rhombic 80° geometry for reliable, productive cast-iron turning; order the CNMG120404-MK5 WKK20S insert directly via Metav Werkzeuge or consult our specialists for integration advice

CNMG120404-MK5 WKK20S indexable turning insert — Rhombic 80° for cast iron, Walter Tools

The CNMG120404-MK5 WKK20S is a rhombic 80° indexable turning insert engineered for productive machining of cast iron, combining the Tiger·tec Silver coating and an MK5 chipbreaker for optimised chip formation in demanding turning operations

• Tiger·tec Silver coating for wear resistance
• Optimised for cast iron machining
• Rhombic 80° geometry for versatile turning
• MK5 chipbreaker for controlled chip formation

Increased throughput through optimised grade and geometry

The combination of the WKK20S carbide grade with the Tiger·tec Silver coating delivers measurable benefits for cast-iron turning: enhanced wear resistance and reduced flank wear lead to longer intervals between index changes and fewer interruptions in the production flow. The Rhombic 80° form and a corner radius 0.4 mm provide flexible cutting engagement for a wide range of turning tasks, reducing setup complexity while maintaining consistent dimensional results. With the MK5 chipbreaker, the insert fosters predictable, short chips that simplify evacuation and protect the tool life, contributing directly to improved cycle times and lower unit costs.

Reliable performance for cast iron (ISO group K)

Designed specifically for abrasive, short-chip materials, this insert is tuned for the challenges of cast-iron machining. The substrate and coating address the common causes of rapid wear when cutting grey and nodular cast irons by combining toughness with surface protection. The result is stable cutting behaviour even under interrupted cuts and variable depths, which in practice reduces rework and improves surface quality. For workshops seeking consistent repeatability in series production, the engineering focus on cast iron makes this insert a dependable choice for process stabilisation.

Coating technology and process advantages

The Tiger·tec Silver coating technology enhances thermal resilience and reduces adhesive wear at the cutting edge, supporting higher cutting data where machine rigidity and workholding permit. When paired with the MK5 chipbreaker and a 0° negative relief angle, the insert offers a controlled cutting action that balances edge strength with chip formation. These technical characteristics translate into tangible shop-floor advantages: extended index life, fewer tool changes, and a better first-pass surface finish. For production planners, the insert’s properties help to predict tool consumption more accurately and to optimise tooling budgets.

For machining cast iron with consistent productivity and predictable tool life, contact Metav Werkzeuge for tailored advice on Walter Tools Tiger·tec Silver inserts — email info@metav-werkzeuge.com or call +49 2822 7131930

Technical data

• Article number: CNMG120404-MK5-WKK20S-WALTER
• Product type: Indexable turning insert
• Designation: CNMG120404-MK5 WKK20S
• Manufacturer: Walter Tools

Core specifications

• Insert size: 12
• Thickness: 04
• Corner radius: 0.4 mm
• Relief angle: 0° (negative)
• Tolerance class: M
• Shape: Rhombic 80°

Features & suitability

• Grade: WKK20S (Tiger·tec Silver)
• Chipbreaker: MK5
• Suitable for: cast iron (ISO group K)
• Coating technology: Tiger·tec Silver
• Series: Tiger-tec Silver
• Material code: K

FAQ

Which materials can be machined with this insert?
The CNMG120404-MK5 WKK20S insert is optimised for cast iron (ISO group K) and provides controlled chip behaviour and wear resistance when turning grey and nodular cast irons.

What does the MK5 chipbreaker provide?
The MK5 chipbreaker ensures predictable, short chips and improved chip evacuation; when used with the Tiger·tec Silver grade it supports stable tool life and consistent surface finish.

How does the Tiger·tec Silver coating benefit production?
The Tiger·tec Silver coating increases thermal and abrasive resistance, allowing higher cutting parameters where conditions permit and reducing the frequency of index changes.

Is the insert suitable for interrupted cuts or heavy-duty turning?
The combination of a 0° negative relief angle and robust grade composition gives the insert good edge strength for many interrupted-cut scenarios typical in cast-iron turning.

What is the meaning of the designation CNMG120404-MK5?
The designation describes the insert geometry and size (CNMG 12 04 04) with the MK5 chipbreaker; CNMG120404-MK5 WKK20S is the full ISO-style identifier used for ordering.

Manufacturer: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen; Germany. The Walter AG (brand: Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik Group. Protected trademarks and trade names are the property of their respective owners. Brand names and protected trademarks are mentioned for explanatory purposes only. There is no connection between our company and the mentioned brands. The offered item is an original, brand-new product from the manufacturer.