CNGA120408TM-2 WBH30 A Wendeplatten - Walter Tools

Benefit from the combination of CBN hardness, a 0.8 mm corner radius and a robust rhombic geometry for consistent performance in hard-turning tasks; order the insert directly via Metav Werkzeuge or request advice from our consultants for process integration.

CNGA120408TM-2 WBH30 indexable turning insert – CBN grade for hardened steels by Walter Tools

CNGA120408TM-2 WBH30 is a CBN turning insert designed for hard and pre-hardened steel machining, offering durable cutting edges for high-wear applications

CBN grade WBH30 for hard machining
Rhombic 80° shape for versatile cutting
Negative 0° clearance for heavy cuts
0.8 mm corner radius for stable edge life

High-wear performance for hardened materials

The CBN-based WBH30 grade delivers excellent wear resistance for sustained performance when machining hardened steels and other high-hardness workpieces. Designed for applications where tool life is critical, the insert’s composition reduces flank wear and maintains cutting-edge geometry under elevated contact temperatures. This results in fewer tool changes, reduced downtime and a more predictable production rhythm for hard turning operations.

Geometry engineered for stability and process reliability

The Rhombus 80° form combined with a 0° negative clearance offers robustness in interrupted cuts and heavy engagement conditions. The 0.8 mm corner radius ensures a stable cutting edge that withstands high radial loads, while the integrated chipbreaker 2 supports controlled chip formation in demanding passes. Together, these features promote consistent chip flow and surface finish while lowering the risk of edge chipping during tough machining cycles.

Productivity gains through predictable tool life

By using a CBN insert from the Walter CBN / Hartstoff series, process planners can expect more consistent component quality and longer machining campaigns between indexings. The insert’s stable wear characteristics support tighter tolerances and repeatable results in series production, translating into lower unit costs and improved throughput for hard-material components. The combination of material, geometry and chip control targets both performance and economy.

Practical application guidance for integration

Best results are achieved with a rigid toolholder and secure workpiece clamping to exploit the insert’s resistance to high cutting forces. The insert suits turning operations on hardened steels and pre-hardened workpieces where CBN is preferred over conventional carbide solutions. When programming cutting cycles, prioritise stable feeds and controlled depths of cut to maintain edge integrity; this approach leverages the insert’s wear resistance while optimising surface quality and dimensional stability.

For application support and to specify the correct Walter Tools CBN insert for a given hard-turning task, contact Metav Werkzeuge – experts are available to advise on selection and process implementation (info@metav-werkzeuge.com • +49 2822 7131930)

Technical data

• Article number: CNGA120408TM-2-WBH30-WALTER
• SKU: CNGA120408TM-2-WBH30-WALTER
• Designation: CNGA120408TM-2 WBH30

Facts

• Corner radius: 0.8 mm
• Plate size: 12
• Plate thickness: 04
• Clearance angle: 0° (negative)
• Plate form: Rhombus 80°
• Chipbreaker: 2
• Tolerance class: G

Special features

• Series: Walter CBN / Hartstoff
• Grade: WBH30 (CBN cutting material)
• Material suitability: hardened steels, pre-hardened steel
• Application: hard turning and high-wear machining tasks
• Execution: A

FAQ

What materials is this insert intended for?
The CNGA120408TM-2 WBH30 insert is intended primarily for hardened steels and pre-hardened steel applications, using the CBN WBH30 grade for high wear resistance.

How does the rhombic 80° shape affect cutting performance?
The Rhombus 80° geometry provides a versatile cutting edge orientation that balances strength and accessibility, making the insert suitable for a variety of turning operations where robustness and edge life are required.

Why is a 0° negative clearance useful?
A 0° negative clearance increases edge strength and stability under heavy radial loads, which helps to maintain cutting-edge integrity during tough or interrupted cuts.

Can this insert improve process repeatability?
Yes; the CBN composition and the stability of the insert’s geometry help to deliver consistent wear behaviour, supporting repeatable tolerances and surface finishes across production batches.

Is the corner radius suitable for finishing or roughing?
The 0.8 mm corner radius is a compromise between durability and finish quality—providing enhanced edge strength for roughing while still permitting acceptable surface finishes in many hard-turning applications.

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

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 article is an original, factory-new product from the indicated manufacturer.