CNGA120404SM-S WCH10C WCH10C Wendeplatten - Walter Tools

Benefit from the combination of wear-resistant coated ceramic, stable chip control and a geometry optimised for hard turning to keep productivity high. Order directly via Metav Werkzeuge or consult our specialists for application-specific cutting data.

CNGA120404SM-S WCH10C — Turning indexable insert with coated ceramic grade and 0° negative rake, Walter Tools

The CNGA120404SM-S WCH10C is a rhombic 80° turning insert designed for temperature-resistant, high-speed hard turning of treated steels and pre-hardened components.

• Coated ceramic grade WCH10C
• Suitable for hardened steels (ISO H)
• Rhombic 80° geometry for stable turning
• 0.4 mm corner radius, 0° negative rake

High-speed performance for hard turning

The insert’s coated ceramic composition is engineered for high-speed and temperature-resistant operations, making it a robust choice where conventional carbides reach their limits. Its wear characteristics translate into longer effective tool life under heavy-duty conditions, while the cutting-material combination contributes to consistent edge integrity. This results in fewer interruptions, reduced rework and improved throughput for hard machining tasks.

Geometry that stabilises cut and improves surface quality

The rhombic 80° geometry and the 0° negative rake deliver a stable cutting edge in demanding operations, particularly where interrupted cuts or variable section thickness occur. The 0.4 mm corner radius enhances edge strength and reduces chipping risk, while the chipbreaker S is tuned to support controlled chip formation. Together these features facilitate predictable chip flow and contribute to improved surface finish with reduced risk of tool edge failure.

Process reliability and cost-efficient productivity

Designed for repeatable performance, the insert supports process reliability through steady wear patterns and reliable seating in standard clamping systems. For production environments machining hardened steels or pre-hardened components, the combination of material grade and geometry helps lower downtime and tooling change frequency, thereby improving overall cost-efficiency and shop-floor predictability.

Practical application and handling guidance

The CNGA designation identifies a standard indexable form compatible with common turning toolholders; the code reflects the insert’s inscribed circle and thickness characteristics. The insert is particularly suited to operations classified under ISO group H (hardened steels) and is applicable to many pre-hardened steel and general steel tasks. For optimal results, pair the insert with a rigid holder and select cutting parameters adapted to the workpiece hardness and machine capability.

For high-speed hard turning with Walter Tools’ WCH10C grade, contact Metav Werkzeuge for tailored cutting data and availability at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss application-specific recommendations

Technical data

• Article number: CNGA120404SM-S-WCH10C-WALTER
• Designation: CNGA120404SM-S WCH10C
• Manufacturer: Walter Tools
• Product type: Turning indexable insert
• Series: Walter CBN / Hartstoff
• Grade: WCH10C

Facts

• Inscribed circle: 12 mm
• Thickness code: 04
• Corner radius: 0.4 mm
• Free angle: 0° (negative)
• Chipbreaker: S
• Tolerance class: G

Special features

• Coated ceramic grade (temperature-resistant)
• Suited for hardened steels (ISO H)
• Applicable to steel and pre-hardened steel
• Rhombus 80° plate form
• Version: A

FAQ

What materials is this insert suitable for?
The CNGA120404SM-S WCH10C insert by Walter Tools is specified for hardened steels (ISO H) and is also suitable for many pre-hardened steel and general steel applications.

How does the 0° negative rake affect cutting?
A 0° negative rake improves edge strength and stability under heavy loads; the Walter Tools WCH10C grade uses this geometry to reduce chipping risk during hard turning.

What is the benefit of the 0.4 mm corner radius?
The 0.4 mm corner radius increases edge robustness, resulting in a more durable cutting edge and better resistance to mechanical shock and wear in interrupted or hard-cutting conditions.

Which chip control behaviour can be expected from the chipbreaker S?
The chipbreaker S promotes consistent chip formation and evacuation, supporting improved process reliability and surface finish when machining tough or hardened materials.

Is this insert compatible with standard CNGA toolholders?
Yes, the CNGA form matches common indexable turning holders; correct clamping and a suitably rigid holder are recommended to exploit the WCH10C grade’s performance.

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

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