CNGA120412SM-S WCH10C WCH10C Wendeplatten - Walter Tools

The combination of high wear resistance and a stable rhombic geometry ensures reliable hard-turning performance, while the coated ceramic grade delivers consistent surface quality under elevated temperatures. Order the CNGA120412SM-S WCH10C turning insert directly via Metav Werkzeuge or ask our consultants if needed.

CNGA120412SM-S WCH10C turning insert — Walter Tools, Rhombic 80°, CBN/hard-material grade

The CNGA120412SM-S WCH10C is a negative-rake, rhombic 80° indexable insert engineered for hard turning and temperature-resistant cutting of hardened steels.

WCH10C coated cutting ceramic
Designed for hard turning of hardened steel
Rhombic 80° geometry for stable cutting
0° negative rake for interrupted cuts

High-performance hard turning for consistent results

The insert’s WCH10C grade is a coated cutting ceramic developed for high cutting speeds and temperature-resistant conditions; this makes it particularly suited to machining hardened steel and other hard materials. The combination of a wear-resistant substrate and a tailored coating results in extended tool life and reduced edge breakdown, which directly supports predictable cycle times and fewer tool changes. In production environments where component hardness and thermal loads are high, the insert’s capability to maintain a sharp, stable edge reduces the risk of scrap and rework, contributing to improved process efficiency.

Geometry designed for stability and chip control

With a Rhombic 80° form and a 1.2 mm corner radius, the geometry provides a stable cutting line and improved edge strength, while the integrated S-type chipbreaker promotes controlled chip formation in hard turning tasks. The 0° negative rake enhances resistance to impact and is beneficial when machining interrupted surfaces or workpieces with variations in hardness. Together these features produce a consistent surface finish and enable secure engagement on robust tool holders, making the insert a reliable choice for demanding turning operations.

Efficiency through material selection and wear resistance

As a member of the Walter CBN / hard-material series, the insert emphasises wear resistance and thermal stability. The coated ceramic chemistry is chosen to withstand high temperatures at the cutting zone, meaning that machining parameters can be pushed to higher speeds without rapid degradation. The result is an improved cost-efficiency per component: fewer tool changes, longer uninterrupted running, and a higher throughput in hard machining applications. Where abrasive wear and edge softening would typically limit performance, this grade maintains integrity for longer production runs.

Practical application and compatibility guidance

The insert is supplied in the CNGA120412SM-S format and is compatible with tool systems designed for rhombic 80° turning inserts; its designation aligns with standard clamping and seat geometries. It is particularly indicated for the ISO material group H (hardened steels) and is likewise suitable for pre-hardened steel workpieces where a wear-resistant tool is required. For best results, pair the insert with a rigid toolholder and adapt cutting parameters to the specific workpiece hardness and machine capabilities—this approach secures the balance between productivity and surface quality.

Contact Metav Werkzeuge for tailored cutting data, inventory availability and application consulting on Walter Tools CNGA120412SM-S WCH10C turning inserts

Technical Data

• Article number: CNGA120412SM-S-WCH10C-WALTER
• Designation: CNGA120412SM-S WCH10C
• Manufacturer: Walter Tools

Facts

• Insert form: Rhombic 80°
• Corner radius: 1.2 mm
• Inscribed circle: 12 mm
• Thickness: 04
• Relief angle: 0° (negative)
• Tolerance class: G

Special features

• Grade: WCH10C
• Series: Walter CBN / Hard material
• Chipbreaker: S
• Execution: A
• Suitable for: hardened steel
• Suitable for: pre-hardened steel

FAQ

What materials is this insert suited for?
The CNGA120412SM-S WCH10C insert is designed for machining hardened steel and is also suitable for pre-hardened steel applications, reflecting the intended ISO material group H.

How does the 0° negative rake affect performance?
A 0° negative rake increases edge robustness for interrupted cuts and heavy engagement; the CNGA120412SM-S WCH10C benefits from this geometry when stability and impact resistance are priorities.

Which chip control can be expected with this grade?
The integrated S-type chipbreaker in the CNGA120412SM-S WCH10C promotes stable chip formation during hard turning, aiding safe evacuation and consistent surface quality.

Is this insert compatible with standard toolholders for CNGA inserts?
Yes, the CNGA120412SM-S format corresponds to common toolholder interfaces for rhombic 80° inserts; ensure the holder suits negative-rake inserts and provides sufficient rigidity.

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

The Walter AG (brand appearance: Walter Tools) is among the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik Group. Protected trademarks and trade names remain the property of their respective owners. Mark names and registered trademarks are cited solely for explanation and identification; no affiliation with our company is implied.