CPMT09T308-MK4 WKK20S WKK20S Wendeplatten - Walter Tools

The combination of Tiger·tec Silver wear resistance and the WKK20S grade tailored for cast iron delivers reliable tool life and consistent chip control; the rhombic 80° geometry with an 11° free angle and 0.8 mm corner radius ensures robust edges and good surface finish — order the insert directly via Metav Werkzeuge or consult our specialists for application-specific advice.

CPMT09T308-MK4 WKK20S indexable turning insert for cast iron, Walter Tools

The CPMT09T308-MK4 WKK20S is a rhombic, coated carbide insert designed for productive turning of cast iron components, integrating Tiger·tec Silver technology and an MK4 chipbreaker.

• Tiger·tec Silver coating for improved wear resistance
• WKK20S grade optimised for cast iron applications
• Rhombic 80° geometry for versatile turning and facing
• MK4 chipbreaker for controlled, short chips

Maximise productivity on cast iron with a wear-resistant grade

This insert pairs the WKK20S coated-carbide grade with Tiger·tec Silver technology to address the abrasive nature of cast iron (ISO group K). The grade is formulated for reliable performance under the frequent, short-breaking chip conditions typical of grey and nodular cast iron. As a result, machinists benefit from extended tool life and predictable wear patterns, which in turn support stable process windows and reduced downtime. The insert’s construction focuses on efficiency and repeatability in series production.

Geometry and chip control that improve surface quality and process stability

The rhombic 80° profile offers flexibility for both longitudinal turning and light facing operations, while the 11° free angle reduces flank rubbing and heat generation. A 0.8 mm corner radius balances edge strength with achievable finish, making the insert suitable for semi-finish to finishing passes where a controlled edge is required. The MK4 chipbreaker is tuned for short, manageable chips on cast iron, improving evacuation and helping to prevent workpiece marking — an important consideration when consistent surface quality is required.

Robust design for consistent results and simplified tooling decisions

Available in size 09 with thickness T3, this insert integrates smoothly into common toolholder systems for inserts of its designation. The coated substrate and chipbreaker combination contributes to steady performance even under variable cutting conditions. Choosing a Tiger·tec Silver insert with the WKK20S grade supports cost-efficiency through longer intervals between index changes and fewer unexpected tool failures. The proven Walter Tools platform offers the process security sought in industrial turning operations.

Contact Metav Werkzeuge for tailored recommendations on insert selection and availability of Walter Tools parts; technical queries and rapid supply options can be discussed at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical Data

• SKU: CPMT09T308-MK4-WKK20S-WALTER
• Designation: CPMT09T308-MK4 WKK20S
• Product type: indexable turning insert (Drehwendeschneidplatte)
• Manufacturer: Walter Tools

Facts

• Geometry: Rhombic 80°
• Free angle: 11°
• Corner radius: 0.8 mm
• Insert size: 09
• Thickness: T3
• Tolerance class: M

Special features

• Coating/series: Tiger·tec Silver
• Grade: WKK20S (coated carbide)
• Chipbreaker: MK4
• Material application: cast iron (ISO group K)
• Execution: T
• Sort description: suitable for abrasive wear and short, breaking chips

FAQ

Which materials is this insert intended for?
The CPMT09T308-MK4 WKK20S is specified for cast iron (ISO group K); the WKK20S grade and Tiger·tec Silver coating are tuned to resist abrasive wear and to handle short, breaking chips typical of cast materials.

What advantages does the MK4 chipbreaker provide?
The MK4 chipbreaker on this Walter Tools insert promotes controlled, short chips when turning cast iron, improving chip evacuation and reducing the risk of surface damage during continuous production.

How does the rhombic 80° geometry affect application range?
The rhombic 80° shape gives flexibility for both longitudinal turning and light facing operations; combined with the 11° free angle, it supports stable cutting and reduced flank contact for improved surface finish.

Is the insert suitable for finishing passes?
Yes; with a 0.8 mm corner radius and the coated grade, the insert can be used for semi-finish to finish turning where a balance of edge strength and surface quality is required.

What series and coating technology does this insert use?
This product belongs to the Tiger·tec Silver series and uses a coated carbide grade WKK20S, offering enhanced wear resistance for demanding cast-iron machining.

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

Walter Tools (Walter AG) is a global manufacturer of precision cutting tools and is part of the Sandvik group. Protected trademarks and product names remain the property of their respective owners. The mentioned brand is cited for explanation; there is no affiliation between our company and the brands named. The offered article is original, factory-new merchandise of the manufacturer.