CNGA120408TM-M2 WBH20C - Walter Tools

Benefit from the combination of CBN wear resistance and a robust rhombic geometry for consistent, high-quality hard turning results; request supply or technical advice through Metav Werkzeuge for rapid processing and application support.

CNGA120408TM-M2 WBH20C indexable turning insert for hard turning, Walter Tools

A CNGA120408TM-M2 WBH20C indexable turning insert engineered for precision hard turning and stable, repeatable machining of hardened steels and comparable hard materials

• CBN grade WBH20C for hard turning
• Rhombic 80° geometry for secure indexing
• 0.8 mm corner radius for robust edge
• Negative 0° rake for stable cutting

Exceptional wear resistance for hardened materials

The CBN-based cutting grade WBH20C delivers pronounced wear resistance and thermal stability when machining hardened steels. As a coated CBN grade developed for hard and highly abrasive workpieces, it sustains longer cutting intervals and reduces edge breakdown under high contact stresses. This leads to fewer interruptions for tool change, improved uptime and a more predictable production rhythm, which supports cost-effective batch machining and increases process reliability.

Geometry and edge form for secure engagement and surface integrity

The rhombic 80° shape combined with a 0.8 mm corner radius and the specified negative 0° rake provides a compromise between cutting strength and surface quality. The geometry promotes reliable clamping and repeatable indexability while the corner radius enhances edge robustness during interrupted cuts and heavy feeds. Together with the M2 chipbreaker, the insert controls chip formation to protect the workpiece surface and to maintain consistent component tolerances in serial production.

Designed for productivity, process security and straightforward integration

Classified in the Walter CBN / Hartstoff series, this insert is tailored for demanding hard-turning tasks and offers stable chip control, reproducible tool life and consistent finishes. The construction supports machining of pre-hardened and hardened steels, enabling higher cutting parameters where tool life permits and reducing cycle times. For application adjustments, machining parameters and grade selection, Metav Werkzeuge provides technical consultation to align insert choice with machine capability and workpiece requirements.

For process-critical hard turning tasks, contact Metav Werkzeuge to secure the Walter Tools CNGA120408TM-M2 WBH20C insert and obtain tailored application advice and rapid delivery

Technical Data

• Article number: CNGA120408TM-M2-WBH20C-WALTER
• Designation: CNGA120408TM-M2 WBH20C
• Product type: Indexable turning insert
• Series: Walter CBN / Hartstoff

Facts

• Inscribed circle: 12 mm
• Thickness code: 04
• Corner radius: 0.8 mm
• Rake/relief: Negative 0° rake
• Chipbreaker: M2
• Tolerance class: G

Special features

• Coated CBN grade WBH20C
• Suitable for hardened steels (H)
• Rhombic 80° insert geometry
• Robust edge for interrupted cuts
• Optimised for process reliability and repeatability
• Designed for hard turning and hard material applications

FAQ

What materials is this insert suitable for?

The CNGA120408TM-M2 WBH20C insert is designed primarily for hardened steels and similar hard materials, reflecting its CBN-based grade suited to hard turning applications.

How does the WBH20C grade improve tool life compared with conventional grades?

The WBH20C CBN composition offers higher wear resistance and thermal stability, which extends cutting intervals and provides more consistent tool life under high-contact, high-hardness conditions.

Is the insert compatible with standard CNGA toolholders?

Yes, the CNGA120408TM-M2 format corresponds to standard CNGA clamping systems; the insert’s rhombic 80° form and indexable design allow straightforward integration into holders made for CNGA inserts.

What benefits does the M2 chipbreaker provide during hard turning?

The M2 chipbreaker improves chip control under the high pressures common in hard turning, supporting stable cutting, reduced risk of built-up edge and a consistent surface finish on the workpiece.

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

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