CNGA120408TM-2 WBH20C WBH20C Wendeplatten - Walter Tools

The combination of a CBN cutting grade and a robust rhombic geometry delivers stable wear resistance and consistent surface quality on hardened steels; the 0° negative rake and 0.8 mm corner radius support secure cutting and predictable chip control. Order the CNGA120408TM-2 WBH20C via Metav Werkzeuge or consult the application specialists for machining advice.

CNGA120408TM-2 WBH20C indexable insert – CBN grade, Rhombic 80° (Walter Tools)

The CNGA120408TM-2 WBH20C is an indexable insert intended for hard turning and precision finishing of hardened steels, combining a coated CBN cutting grade with a rhombic 80° geometry for reliable edge stability.

• CBN grade WBH20C for hard materials
• Rhombic 80° geometry for secure clamping
• 0° negative rake for consistent chip control
• 0.8 mm corner radius for reliable edge strength

Higher throughput thanks to a wear-resistant CBN grade

The WBH20C is a coated CBN cutting grade developed for demanding hard‑machining tasks. Its high abrasion resistance enables longer tool life when turning hardened steels (ISO group H), reducing tool changes and downtime. As an indexable insert, the CNGA120408TM-2 WBH20C provides consistent wear behaviour across indexed corners, which translates into predictable component tolerances and lower per‑part machining costs. The combination of a wear‑resistant grade and optimised chipbreaking contributes directly to higher spindle utilisation and improved process efficiency.

Consistent surface finish and process security from adapted geometry

The Rhombic 80° shape with a 0° negative rake stabilises the cutting edge under heavy contact conditions, while the 0.8 mm radius increases edge strength to withstand interrupted cuts common in hard turning. These geometric choices ensure reliable chip control and reduced vibration, delivering repeatable surface finish results without excessive feed reductions. Clear geometry‑driven benefits include easier programme validation, fewer scrap incidents and improved confidence in batch production runs, supporting overall process security in the workshop.

Practical selection, integration and application benefits

The insert series is designated for hard materials and supports operations on hardened steels and pre‑hardened components. Its chipbreaker and coated CBN grade are tuned for stable chip formation in high abrasive conditions, which simplifies coolant and parameter selection. For seamless integration, indexable inserts with this geometry suit toolholders designed for CNGA‑style rhombic cutters and benefit from correct clamping torque and stable seat alignment. For tailored cutting data and optimisation in specific alloys or hardening levels, Metav Werkzeuge application engineers are available to recommend feeds, speeds and toolholder pairings to maximise productivity while maintaining component quality.

For machining hardened steels with reproducible results, request an application consultation from Metav Werkzeuge—contact via info@metav-werkzeuge.com or call +49 2822 7131930 to discuss suitability and supply of the Walter Tools CNGA120408TM-2 WBH20C.

Technical Data

• Article number: CNGA120408TM-2-WBH20C-WALTER
• Designation: CNGA120408TM-2 WBH20C
• Series: Walter CBN / Hartstoff
• Grade: WBH20C
• Manufacturer: Walter Tools

Core Data

• Insert size: 12
• Thickness: 04
• Corner radius: 0.8
• Relief angle: 0° (negative)
• Tolerance class: G

Materials & Applications

• Coated CBN cutting grade
• Suitable for hardened steels (ISO group H)
• Applicable to pre‑hardened steel operations
• Rhombic 80° insert form
• Chipbreaker: 2
• Execution: A

FAQ

What materials is this insert intended for?
The WBH20C cutting grade is specifically for hardened steels; the CNGA120408TM-2 WBH20C performs best in hard‑turning and finish operations on ISO group H materials.

Can the insert be used for interrupted cuts?
Yes, the combination of rhombic geometry and a 0.8 mm corner radius provides increased edge strength, making the insert suitable for interrupted hard‑turning scenarios.

Which toolholder style is compatible with this insert?
The CNGA120408TM-2 WBH20C fits holders designed for CNGA‑form inserts with a rhombic 80° seating; ensure correct clamping and seat condition for consistent performance.

How does the CBN grade affect tool life and surface quality?
The CBN composition of WBH20C offers high abrasion resistance, extending tool life and delivering stable surface finish results under the high contact pressures of hard machining.

Are there recommended operating conditions for best results?
For optimal outcomes, pair the insert with a rigid holder, set feeds and speeds according to material hardness, and consult Metav Werkzeuge application data for alloy‑specific parameters.

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

Walter AG (brand presentation: Walter Tools), headquartered in Tübingen, is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Swedish Sandvik Group. Protected trademarks and product names are the property of their respective owners and are used here for explanation only. No affiliation between our company and the named brands is implied. The offered item is original, factory‑new goods of the manufacturer.