CNGA120412TM-MW2 WBH10C Wendeplatten - Walter Tools

Combining CBN wear resistance, a negative 0° rake for cutting stability and precise MW2 chip control, this indexable turning insert delivers extended tool life and consistent process reliability. Order the insert directly via Metav Werkzeuge or ask our consultants if needed.

CNGA120412TM-MW2 WBH10C turning indexable insert — CBN-coated, Rhombic 80° (Walter Tools)

The CNGA120412TM-MW2 WBH10C is a CBN-coated indexable insert engineered for hard turning applications, optimised for use in the Walter CBN / Hartstoff series.

• CBN-coated grade WBH10C for hard machining
• Negative 0° rake for stable cutting
• Rhombic 80° form with 1.2 mm corner radius
• MW2 chipbreaker for predictable chip control

Durable CBN grade for longer life in hard turning

The WBH10C grade is a coated CBN option designed specifically for demanding hard machining. Because cubic boron nitride is much harder and more thermally stable than conventional carbides, this indexable insert resists abrasive wear and maintains edge form under the high contact temperatures encountered when machining hardened steels. For operations where tool life and repeatability directly affect cycle time and rework rates, the increased wear resistance translates into fewer tool changes and more predictable throughput. This makes the insert particularly suitable for shops focused on consistent, high-volume hard turning.

Geometry that secures cutting stability and chip control

The combination of a negative 0° rake and Rhombic 80° geometry offers robust cutting behaviour under heavy engagement. The 0° rake improves insert strength and reduces the risk of edge chipping when forces are high, while the 1.2 mm corner radius increases edge robustness for interrupted cuts. The MW2 chipbreaker has been developed to produce compact, controllable chips, reducing entanglement and helping to safeguard workpiece finishes and machine tool components. These geometry choices work together to provide process security and consistent surface quality in challenging hard-turning cycles.

Application range and material guidance

This insert is intended for the machining of hardened steels (ISO group H) and pre-hardened steels where high hardness and abrasive wear demand a specialised cutting material. The Walter CBN / Hartstoff series and the WBH10C grade are especially suitable where steel components have been hardened to levels that render conventional carbide grades ineffective. CBN inserts excel by maintaining cutting edge integrity at elevated temperatures and by offering improved dimensional stability across longer tool lives, which benefits repeatable and precision-driven production.

Operational benefits and workshop integration

Using a CBN insert such as this one supports stable processes and can reduce overall tooling costs per component through fewer index changes and longer effective cutting distances. The standard ISO designation and the insert’s MW2 chipbreaker simplify machine setup and process documentation, supporting rapid tool qualification and repeatable results across batches. Integration into a production cell is straightforward where stable clamping and correct cutting parameters for hard turning are applied; process monitoring will typically show lower variance in surface finish and dimensional drift compared with less wear-resistant grades. For advice on speeds and feeds specific to an application, Metav Werkzeuge can provide application-oriented recommendations.

Contact Metav Werkzeuge today to discuss Walter Tools WBH10C CBN inserts for optimised hard turning and receive tailored application advice from our specialists

Technical Data

• Article number: CNGA120412TM-MW2-WBH10C-WALTER
• ISO designation: CNGA120412TM-MW2 WBH10C
• Grade: WBH10C

Facts

• Corner radius: 1.2 mm
• Inscribed circle / plate size: 12 mm
• Rake angle: 0° (negative)
• Thickness code: 04
• Tolerance class: G

Special features

• Coating / material: coated CBN cutting material
• Chipbreaker: MW2
• Plate form: Rhombic 80°
• Series: Walter CBN / Hartstoff
• Application: hard machining, hardened steels (ISO group H)

FAQ

What materials is this insert suitable for?
The CNGA120412TM-MW2 WBH10C insert from Walter Tools is designed primarily for hardened steels (ISO group H) and pre-hardened steel applications where wear resistance and thermal stability are critical.

How does the WBH10C grade differ from carbide grades?
WBH10C is a coated CBN grade; unlike carbide, CBN sustains cutting edges at higher temperatures and provides superior resistance to abrasive wear when machining hardened steels, resulting in longer tool life and more consistent performance.

What is the benefit of a 0° negative rake on this insert?
The negative 0° rake increases edge strength and reduces the likelihood of chipping under heavy cutting loads, which contributes to stable, repeatable performances in hard-turning operations with the Walter Tools insert.

How does the MW2 chipbreaker affect machining?
The MW2 chipbreaker on this indexable insert produces compact, predictable chips, improving chip evacuation and reducing the risk of surface damage or tool interference during continuous hard-turning cycles.

Is the Rhombic 80° form suitable for profiling and finishing?
The Rhombic 80° geometry offers a balance between accessibility and strength; combined with the 1.2 mm corner radius and CBN grade, it is suitable for many hard turning and finishing tasks where a robust edge and good surface quality are required.

Manufacturer/Responsible: AB Sandvik Coromant, Mossvägen 10, 811 34 Sandviken, Sweden; support.coromant@sandvik.com

Protected trademarks and trade names are the property of their respective owners. Brand names and protected trademarks are mentioned solely for explanatory purposes. There is no connection between our company and the named brands. The offered article is original, factory-new goods of the manufacturer (Walter Tools).