CNGA120404TM-2 WBH30 WBH30 Wendeplatten - Walter Tools

Take advantage of CBN hardness and precision geometry to achieve consistent results in hard turning: the combination of WBH30 CBN grade and a rhombic 80° form delivers long tool life and process stability for hardened steels. Order the insert directly via Metav Werkzeuge or consult the Metav team for application-specific recommendations.

CNGA120404TM-2 WBH30 — Turning indexable insert for hard machining (Walter Tools)

CNGA120404TM-2 WBH30 is a turning indexable insert designed for high‑wear, high‑hardness applications in industrial machining.

CBN grade for hard machining Rhombic 80° geometry 0.4 mm corner radius Negative 0° clearance for stable cutting

Reliable performance on hardened components

The CBN composition of this grade makes it especially suited to machining hardened steels where abrasive wear and high contact stresses dominate. The CBN matrix provides markedly higher wear resistance than conventional carbide grades, which translates into more consistent tool life and reduced tool changes. For production environments where repeatability is critical, the WBH30 grade offers stable cutting behaviour and predictable performance under sustained loading.

Geometry that stabilises the cutting process

A rhombic 80° insert form combined with a corner radius of 0.4 mm supports secure engagement and controlled chip formation on interrupted and continuous cuts. The negative 0° clearance enhances edge strength, reducing the risk of chipping when machining tough or hardened sections. This geometry delivers an improved balance between strength and surface finish, enabling productive hard turning with lower scrap rates.

Predictable surface quality and repeatability

Tolerance class G and consistent edge preparation contribute to uniform component surfaces from one index to the next. The robust edge and chip control features reduce variability in workpieces, meaning fewer in‑process adjustments and a steadier quality output. When surface integrity and dimensional repeatability are priorities, the combination of CBN hardness and precise geometry reduces rework and inspection time.

Production benefits: efficiency and lower downtime

By extending tool life and offering stable wear characteristics, the insert reduces interruptions for tool changes and process tuning. The insert’s design supports longer uninterrupted runs and a lower total cost per component in hard turning operations. For manufacturing lines focused on throughput and process security, the Walter CBN series assists in maintaining steady cycle times and predictable maintenance intervals.

Application scope and integration

The insert is part of the Walter CBN / Hartstoff series and is intended primarily for the machining of hardened steels (ISO group H), including prehardened materials. The CNGA120404TM‑2 geometry fits standard turning toolholders that accept rhombic 80° inserts and is compatible with machining strategies that prioritise edge strength and wear resistance. Integration into existing tooling systems is straightforward, enabling a rapid transition to CBN‑based performance where hard turning is required.

For application advice or to request cutting data and availability for Walter Tools CBN inserts, contact Metav Werkzeuge GmbH at info@metav-werkzeuge.com or call +49 2822 7131930 for tailored recommendations and fast response

Technical Data

• Article number: CNGA120404TM-2-WBH30-WALTER
• ISO designation: CNGA120404TM-2 WBH30
• Manufacturer: Walter Tools
• Product type: Turning indexable insert
• Series: Walter CBN / Hartstoff
• Grade: WBH30

Facts

• Plate size: 12 mm
• Thickness: 0.4 mm
• Corner radius: 0.4 mm
• Clearance angle: 0° (negative)
• Plate form: Rhombic 80°
• Chipbreaker: 2
• Tolerance class: G

Special features

• CBN cutting material (CBN grade WBH30)
• Suitable for hardened steels (ISO group H)
• Suitable for prehardened steel applications
• Robust edge for hard turning
• Series designation: Walter CBN / Hartstoff
• Execution: A

FAQ

What materials is this insert intended for?
The CNGA120404TM-2 WBH30 insert is engineered primarily for hardened steels (ISO group H) and is suitable for prehardened steel applications common in hard turning.

How does the WBH30 grade improve tool life compared with carbide?
The WBH30 CBN grade offers superior wear resistance under high contact stress and temperature, resulting in longer life and more consistent performance than conventional carbide grades in hard machining.

Which geometry benefits are provided by the rhombic 80° form?
The rhombic 80° shape combines a strong cutting edge with flexible mounting options, improving stability on both continuous and interrupted cuts while supporting good chip control.

Is the insert compatible with standard turning holders?
Yes, the CNGA120404TM-2 form fits holders designed for rhombic 80° inserts; verification of holder compatibility is recommended prior to first use.

What does the negative 0° clearance mean for cutting?
A negative 0° clearance increases edge robustness and reduces the likelihood of edge failure when machining hard or tough materials, favouring durability over shear‑dominant geometries.

Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen, Germany

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