CNGA120408TM-MW2 WBH30 MW2 Wendeplatten - Walter Tools

Take advantage of the combination of CBN cutting grade WBH30, a stable MW2 chipbreaker and robust 80° rhombic geometry for consistent, productive hard-turning operations; order the insert directly via Metav Werkzeuge or consult the technical team for process data and integration advice.

CNGA120408TM-MW2 WBH30 indexable turning insert — Walter Tools, CBN grade for hard turning with MW2 chipbreaker

The CNGA120408TM-MW2 WBH30 indexable turning insert is designed for hard turning of hardened steels, offering an 80° rhombic shape, a 0° negative rake and the MW2 chipbreaker for stable chip formation and reliable engagement.

• CBN grade WBH30 for hard turning
• MW2 chipbreaker for chip control
• Rhombic 80° geometry for versatile cutting
• 0° negative rake for robust engagement

Maximised process stability and productivity for hard materials

The combination of the CBN cutting material and the WBH30 grade targets the demands of hardened steels, where abrasion resistance and thermal stability are crucial. The insert’s MW2 chipbreaker promotes stable chip formation, reducing interruptions caused by irregular chips and enabling more consistent cycle times. The 80° rhombic geometry gives flexibility across turning operations, while the 0° negative rake increases insert strength during heavy engagement. These characteristics translate into fewer indexings, longer effective cutting periods and measurable improvements in throughput for hard-machining applications.

Predictable tool life and controlled cutting behaviour

Built with a defined corner radius 0.8 mm and manufactured to tolerance class G, the insert delivers reliable edge strength and repeatability across batches. The geometry and grade combination supports reproducible wear behaviour, which simplifies process planning and tool-change scheduling. Robustness under load means less risk of edge chipping during interrupted cuts and improved surface integrity on finished components. The result is reduced scrap rates and a more economical machining sequence when working with pre-hardened and fully hardened workpieces.

Practical application notes and process integration

This turning insert is certified for use on hard materials according to ISO 513 and is specifically targeted at the hard turning segment where conventional carbide inserts may fail prematurely. The MW2 chipbreaker is optimised for controlled chip flow; however, cutting parameters depend on machine rigidity and part set-up. For newcomers to CBN technology, small-step trials with progressive feed and depth adjustments are recommended to identify the optimal balance between surface finish and material removal rate. For detailed cutting data, toolholder compatibility or recommended clamping practices, the Metav Werkzeuge consultants can provide documented recommendations and cycle examples to accelerate process adoption.

Discuss integration of Walter Tools CBN inserts with Metav Werkzeuge’s application experts to receive tailored cutting data, toolholder recommendations and to ensure immediate compatibility with existing turning setups.

Technical data

• Article number: CNGA120408TM-MW2-WBH30-WALTER
• ISO designation: CNGA120408TM-MW2 WBH30
• Product type: indexable turning insert
• Manufacturer: Walter Tools
• Series: Walter CBN / hard material

Numbers / Core technical data

• Insert size: 12 mm
• Thickness: 4 mm
• Corner radius: 0.8 mm
• Rake: 0° (negative)
• Tolerance class: G

Special features / Materials

• Cutting grade: WBH30 (CBN)
• Chipbreaker type: MW2
• Shape: Rhombus 80°
• Suitable for: hardened steels (ISO 513)
• Suitable for: pre-hardened steel applications

FAQ

What materials is this insert suitable for?
The CNGA120408TM-MW2 WBH30 indexable turning insert (Walter Tools) is intended for hardened steels and pre-hardened steel applications in accordance with ISO 513, where CBN grades provide the required wear resistance.

How does the MW2 chipbreaker affect machining?
The MW2 chipbreaker on this Walter Tools insert controls chip formation for stable evacuation and consistent cutting forces, contributing to improved process stability during hard turning.

Can this insert be used for interrupted cuts?
Yes. The combination of a 0° negative rake and a 0.8 mm corner radius offers enhanced edge strength, making the insert more tolerant of interrupted cuts compared with more acute geometries.

Is the insert compatible with standard CNGA toolholders?
The ISO designation CNGA120408TM indicates compatibility with holders designed for the CNGA family; correct seat and clamping torque should be checked to ensure secure mounting and repeatable results.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned for explanation only; there is no affiliation between Metav Werkzeuge and the trademark owners. The offered item is an original, factory-new product of the manufacturer.