CNGA120412TM-2 WBH30 Wendeplatten - Walter Tools

Take advantage of the combination of CBN wear resistance, robust rhombic geometry and a 1.2 mm corner radius to achieve consistent, productive hard-turning results; order via Metav Werkzeuge or consult our specialists for process-adapted recommendations.

CNGA120412TM-2 WBH30 — Turning indexable insert for hard turning (Walter Tools)

The CNGA120412TM-2 WBH30 is a rhombic 80° CBN turning insert designed for heavy-duty finishing and hard turning of hardened steels, featuring a 0° negative rake and a 1.2 mm corner radius for excellent edge security.

• CBN grade WBH30 for hard turning
• Rhombic 80° geometry for stable cutting
• 0° negative rake for robust cutting edge
• 1.2 mm corner radius for reliable edge strength

Optimised for hard and pre-hardened steels

The use of CBN (cubic boron nitride) in the WBH30 grade delivers a marked increase in wear resistance compared with conventional carbide grades, making the insert ideal for machining hardened steels and pre-hardened components. CBN is a superabrasive that retains cutting edge integrity at high temperatures and under severe loads; this results in longer tool life and fewer tool changes, which directly reduces downtime and increases throughput in serial production. The material suitability for hard turning ensures controlled flank wear and consistent component tolerances during extended runs.

Geometry engineered for process stability

A Rhombic 80° format combined with a 0° negative rake provides a geometry optimised for mechanical robustness rather than aggressive shearing, which is beneficial when confronting interrupted cuts or hard surfaces. The 1.2 mm corner radius increases edge strength, reducing chipping risk and supporting repeatable surface finishes. Together with the chipbreaker designation (chipbreaker 2), the geometry offers reliable chip control and predictable cutting forces, helping to stabilise spindle load and avoid unplanned stoppages.

Seamless integration into standard toolholders and operations

The ISO designation CNGA120412TM-2 denotes a common insert form factor that fits a wide range of turning tool holders, simplifying tool inventory and changeover. The indicated thickness (04) and insert size (12) match established holder specifications, allowing straightforward retrofitting into existing setups. Reduced setup complexity translates into faster machine returns and lower indirect production costs. The series designation Walter CBN / Hartstoff highlights a product family developed specifically for hard machining tasks, with process consistency and tool-life predictability as primary aims.

Benefit-focused application guidance

This insert is best applied in finishing and light-medium interrupted hard-turning operations where surface integrity and dimensional stability are priorities. The WBH30 grade is tailored for high hardness and abrasive conditions; when combined with an appropriate cutting strategy—reduced depth of cut and optimised feed for the intended finish—the insert contributes to reproducible component quality and fewer downstream rework steps. For unfamiliar materials or borderline cases, seek process advice to match cutting parameters with the CBN performance profile.

Contact Metav Werkzeuge for tailored application advice or to request a production-oriented recommendation based on the CNGA120412TM-2 WBH30 insert and the specific material being machined; email info@metav-werkzeuge.com or call +49 2822 7131930 for prompt support

Technical Data

• Article number: CNGA120412TM-2-WBH30-WALTER
• Product type: Turning indexable insert
• Series: Walter CBN / Hartstoff
• Grade: WBH30

Facts

• Corner radius: 1.2 mm
• Relief angle: 0° (negative)
• Insert size: 12
• Thickness: 04
• Chipbreaker: 2

Special features

• Cutting material: CBN (cubic boron nitride)
• Plate form: Rhombus 80°
• Intended application: Hard turning / hardened steels
• Series focus: Hard material machining, wear-resistant performance

FAQ

What materials is this insert suitable for?
The CNGA120412TM-2 WBH30 insert is designed primarily for hardened steels and is suitable for pre-hardened steel applications, thanks to the WBH30 CBN grade.

How does the 0° negative rake affect performance?
A 0° negative rake provides a robust cutting edge that resists chipping under heavy loads, which improves process stability when using the WBH30 CBN insert in hard turning.

Which holder types accept this ISO insert form?
The CNGA120412TM-2 conforms to common ISO dimensions for rhombic turning inserts and fits standard turning tool holders designed for CNGA inserts.

What benefit does the 1.2 mm corner radius provide?
The 1.2 mm corner radius increases edge strength, reduces the risk of chipping and supports consistent surface finish in finishing passes on hard materials.

Is this insert from a dedicated CBN series?
Yes; the insert belongs to the Walter CBN / Hartstoff series, developed specifically for hard machining tasks with an emphasis on stable wear behaviour and reproducible results.

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

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