CNGA120408SM-S WCH10C Wendeplatten - Walter Tools

Take advantage of a high-speed, temperature-resistant cutting solution for hard turning: the combination of the WCH10C coated ceramic grade, stable 0° negative rake geometry and an 80° rhombic form delivers consistent edge life and reliable chip control for hardened steels; order via Metav Werkzeuge or consult the technical team for application advice.

CNGA120408SM-S WCH10C indexable turning insert — Walter Tools, coated ceramic for hard turning

CNGA120408SM-S WCH10C is a rhombic 80° indexable turning insert engineered for high-speed and temperature-resistant machining of hardened and pre-hardened steels

Coated ceramic grade WCH10C
Engineered for hardened steels (ISO H)
Rhombic 80° with 0.8 mm nose radius

High-speed, temperature-resistant cutting for hard turning

The WCH10C grade is a coated ceramic cutting material formulated for abrasive, high-temperature environments encountered during hard machining. Its chemistry and coating strategy support sustained cutting at elevated speeds, which reduces cycle times while maintaining surface integrity. The 0° negative rake geometry provides a sturdy cutting edge that helps resist chipping under heavy radial loads; this results in predictable tool life and fewer unplanned insert changes during serial production.

Stable chip control and repeatable surface quality

The insert’s S chipbreaker combined with a 0.8 mm nose radius produces controlled chip formation and consistent cutting forces, benefitting process stability and surface finish. In practice, the defined chip management reduces the need for intermittent chip clearing and supports continuous operation on hardened workpieces. This reliability translates into lower process variability and improved throughput for centres machining components from hardened steels and pre-hardened stock.

Robust geometry that fits standard CNGA toolholders

Designed in the CNGA family, the insert’s rhombic 80° shape and designation size 12 with thickness 04 ensure compatibility with established CNGA toolholder systems. The form factor offers two usable cutting edges per indexed position, enabling cost-effective utilisation of the insert body. Clear geometric definition simplifies inventory management and tool-change procedures, supporting leaner toolroom workflows without sacrificing machining capability.

Application scope and practical recommendations

Part of the Walter CBN / Hartstoff series and marked for ISO group H (hardened steels), this insert is best applied to finishing and semi-finishing passes on hard-turned components where temperature resistance and edge stability are essential. The coated ceramic grade is optimised for elevated cutting speeds; toolpaths and feeds should be selected in accordance with machine rigidity and workpiece clamping to exploit the material benefits fully. For detailed cutting data and process matching, consult the Metav Werkzeuge specialists.

Contact Metav Werkzeuge for tailored application support on Walter Tools CNGA120408SM-S WCH10C, and request machining recommendations matched to the workpiece material and machine setup

Technical data

• Article number: CNGA120408SM-S-WCH10C-WALTER
• Designation: CNGA120408SM-S WCH10C
• Product type: indexable turning insert (Drehwendeschneidplatte)
• Manufacturer: Walter Tools
• Series: Walter CBN / Hartstoff

Facts

• Grade: WCH10C
• Relief angle: 0° (negative)
• Corner radius: 0.8 mm
• Plate form: Rhombus 80°
• Plate size: 12
• Plate thickness: 04
• Chipbreaker: S
• Tolerance class: G

Special features

• Coated ceramic cutting material
• Target material group: H (hardened steels)
• Suitable for pre-hardened steel applications
• Designed for high cutting speeds and temperature resistance

FAQ

What materials is this insert designed to machine?
The CNGA120408SM-S WCH10C insert is specified for ISO group H, meaning it is designed for hardened steels and is also suitable for pre-hardened steel applications.

How does the 0° negative rake affect performance?
A 0° negative rake offers a robust cutting edge that resists chipping under high radial loads, improving edge life and stability during hard turning with the WCH10C grade.

What does the S chipbreaker provide?
The S chipbreaker promotes controlled chip formation and evacuation, supporting continuous machining and consistent surface quality on hard materials.

Is this insert compatible with standard CNGA holders?
The CNGA geometry and the designation size 12 correspond to common CNGA toolholder systems, enabling straightforward mounting and indexing in standard holders.

Where is this insert typically used in the machining process?
It is typically used for finishing and semi-finishing of hardened and pre-hardened components, where temperature resistance and a stable cutting edge are required.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and protected trade names are mentioned for explanatory purposes only. There is no affiliation between our company and the mentioned brands. The offered item is original, brand-new goods from the manufacturer. The brand in this listing is Walter Tools.