CNGA120412SM-MWS WCH10C Wendeplatten - Walter Tools

Take advantage of the combination of high-speed performance, reliable chip control and stable edge life for efficient hard turning workflows. Benefit from the coated ceramic cutting grade and the optimised chipbreaker geometry to reduce downtime. Order the insert directly via Metav Werkzeuge or consult our technical team for application support.

CNGA120412SM-MWS WCH10C indexable turning insert — Walter Tools, coated ceramic for hard machining

The CNGA120412SM-MWS WCH10C is an indexable turning insert developed for hard machining of hardened steels; it pairs a coated ceramic cutting grade with a dedicated chipbreaker and a rhombic 80° geometry for stable, high‑speed turning.

WCH10C: coated ceramic CBN grade
Optimised for hardened steels (ISO H)
Rhombic 80° geometry, corner radius 1.2 mm
Negative 0° clearance for stable cutting

Consistent performance under high cutting speeds

The WCH10C cutting grade is a coated ceramic formulation designed for high cutting speeds and temperature‑resistant conditions encountered in hard turning. In practice, this means a reduction in flank wear when machining hardened steels, as the coating and ceramic substrate resist thermal softening and abrasive loads. The result is a more predictable tool life, which supports stable process planning and fewer unscheduled insert changes in production.

Reliable chip control and cutting stability

Built around the chipbreaker MWS and an rhombic 80° insert form, the geometry promotes even chip segmentation and evacuation. The corner radius 1.2 mm provides a balance between edge strength and surface finish, while the negative 0° clearance increases cutting edge stability in interrupted cuts or heavy feed conditions. These combined features translate into consistent surface integrity and reduced risk of edge chipping during hard finishing operations.

Seamless integration and production benefits

As an indexable turning insert from the Walter CBN / hard material series, this grade is intended for applications where repeatability and process reliability matter. The insert code and form allow simple mounting in standard CNGA toolholders, enabling quick index changes and minimal setup time. Because the grade is targeted at ISO group H (hardened steels), planning toolpaths and speeds becomes more straightforward: predictable wear behaviour supports longer production runs and improved overall equipment effectiveness.

For recommendations on tooling set‑ups or to source the CNGA120412SM-MWS WCH10C insert for a specific hardened-steel application, contact Metav Werkzeuge for technical consultation and order processing via info@metav-werkzeuge.com or +49 2822 7131930

Technical Data

• Article number: CNGA120412SM-MWS-WCH10C-WALTER
• Product type: Drehwendeschneidplatte / indexable turning insert
• Designation: CNGA120412SM-MWS WCH10C
• Brand: Walter Tools

Data

• Corner radius: 1.2 mm
• Inscribed circle / size: 12 mm
• Relief / clearance: 0° (negative)
• Thickness code: 04
• Tolerance class: G

Special features

• Series: Walter CBN / hard material
• Grade: WCH10C (coated ceramic cutting grade)
• Chipbreaker: MWS
• Geometry: Rhombic 80°
• Application focus: Hardened steels (ISO H)
• Execution: A

FAQ

What materials is this insert designed to machine?
The CNGA120412SM-MWS WCH10C is formulated for machining hardened steels (ISO group H) and is suitable where high wear resistance and thermal stability are required.

How does the MWS chipbreaker affect productivity?
The chipbreaker MWS promotes controlled chip formation and evacuation, which improves process reliability and reduces manual chip handling during high‑volume hard turning.

Is this insert compatible with standard CNGA toolholders?
Yes, the insert form and designation correspond to standard CNGA holders; the rhombic 80° shape and size code allow straightforward mounting and indexing.

What advantages does the negative 0° clearance provide?
The negative 0° relief increases cutting edge support and stability, particularly beneficial for interrupted cuts and heavy feed scenarios common in hard finishing.

Can this grade be used for pre‑hardened steel?
The WCH10C grade is intended for hard machining and is also suitable for many pre‑hardened steels, offering robust edge life under elevated cutting temperatures.

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

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