CNGA120408TM-MW2 WBH20C MW2 Wendeplatten - Walter Tools

Take advantage of the combination of highly wear‑resistant CBN grade, stable geometry and reliable chip control to maintain consistent performance in hard turning operations; order the insert through Metav Werkzeuge or consult their specialists for process advice.

CNGA120408TM-MW2 WBH20C indexable turning insert — CBN grade for hardened steels, rhombic 80° by Walter Tools

The CNGA120408TM-MW2 WBH20C is a negative‑rake, rhombic 80° indexable insert engineered for consistent hard turning and finishing of hardened steels in industrial production environments

• CNGA120408TM-MW2 WBH20C turning insert by Walter Tools
• Coated CBN grade WBH20C for hard turning
• Rhombic 80° shape, negative 0° clearance
• 0.8 mm corner radius with MW2 chipbreaker

High‑performance hard turning with long tool life

The CBN‑based cutting grade WBH20C provides exceptional abrasion resistance for demanding operations on hardened steels, delivering longer tool life compared with conventional carbide solutions. The coated cubic boron nitride matrix is developed for high contact stresses and elevated temperatures encountered in hard machining, which translates into fewer insert changes and increased uptime. This makes the insert particularly suitable where reproducible cycle times and low corrective rework are essential.

Geometry for stable cutting and improved surface finish

The Rhombic 80° configuration and 0° (negative) clearance stabilise cutting forces and support axial and radial rigidity during turning. A 0.8 mm corner radius gives a robust edge that resists chipping while still enabling good surface integrity, and the MW2 chipbreaker is tuned to promote predictable chip formation and evacuation in interrupted or continuous cuts. Together these geometric choices reduce vibration, help maintain dimensional accuracy and support consistent part quality.

Process efficiency and reproducible results in series production

Designed within the Walter CBN / Hard material series, the insert addresses the ISO H group for hardened steels, enabling higher cutting speeds and continuous chip control where traditional inserts would wear early. The combination of grade and geometry supports reduced secondary operations and contributes to improved overall process efficiency. For production managers, this means a lower total cost of machining per part due to extended edge life and steady performance under repetitive loads.

Integration, selection and shop‑floor reliability

The insert fits standard indexable turning toolholders for negative‑rake rhombic inserts and is available with thickness and size codes matching common holder families, enabling straightforward tool changeovers and inventory handling. When selecting grades and cutting data, prioritise the WBH20C grade for components manufactured from hardened steels or where hard finishing is required. For specification matching and cutting‑data recommendations, Metav Werkzeuge provides application guidance and can assist in choosing the optimal tooling setup for stability and productivity.

For application support or to specify Walter Tools’ CBN technology for hardened machining, contact Metav Werkzeuge to request the CNGA120408TM-MW2 WBH20C insert and obtain tailored cutting‑data and procurement assistance via info@metav-werkzeuge.com or +49 2822 7131930.

Technical Data

• SKU: CNGA120408TM-MW2-WBH20C-WALTER
• Designation: CNGA120408TM-MW2 WBH20C
• Product type: indexable turning insert
• Series: Walter CBN / Hard material
• Grade: WBH20C
• Manufacturer: Walter Tools
• Version: A

Specifications

• Shape: Rhombus 80°
• Free angle: 0° (negative)
• Corner radius: 0.8 mm
• Insert size: 12
• Thickness code: 04
• Chipbreaker: MW2
• Tolerance class: G

Applications & Features

• Suitable for: hardened steels (ISO H)
• Also applicable: pre‑hardened steel operations
• Coated CBN cutting grade optimised for hard machining
• Stable edge for repeatable process reliability
• Designed for predictable chip control and surface quality

FAQ

What materials are recommended for this insert?
The CNGA120408TM-MW2 WBH20C insert is recommended primarily for hardened steels (ISO H); the WBH20C CBN grade is formulated for hard turning and hard finishing tasks.

How does the MW2 chipbreaker affect machining?
The MW2 chipbreaker promotes controlled chip formation and evacuation, improving stability and surface quality in continuous and interrupted hard turning with the CNGA120408TM‑MW2 WBH20C.

Which edge radius is supplied and what benefit does it offer?
The insert features a 0.8 mm corner radius, which offers a robust cutting edge that reduces chipping and helps maintain dimensional stability on hard materials.

Is the insert compatible with standard negative‑rake holders?
Yes, the insert’s rhombic 80° geometry and negative clearance are intended for use with standard holders designed for this insert family; confirm holder compatibility before assembly.

Does this insert belong to a specialised series?
It is part of the Walter CBN / Hard material series; the WBH20C grade is a coated CBN solution optimised for demanding hard machining.

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

Die Walter AG (branded as Walter Tools) with headquarters in Tübingen is one of the world’s leading manufacturers of precision tools for metalworking and is part of the Sandvik group. Protected trademarks and product names belong to their respective owners. Mention of brand names serves informational purposes only and does not imply any affiliation.