WNGA080408TM-3 WBH20 WBH20 Wendeplatten - Walter Tools

Reliable CBN performance and a Trigon 80° geometry deliver consistent results in hard turning; the WBH20 grade and 0° negative rake combine for high wear resistance and process stability. Order the WNGA080408TM-3 WBH20 directly via Metav Werkzeuge or ask our consultants if needed.

WNGA080408TM-3 WBH20 Trigon 80° CBN turning insert, 0° negative rake — Walter Tools

The WNGA080408TM-3 WBH20 is a trigon-style indexable insert designed for hard machining tasks, optimised for the turning of hardened and pre-hardened steels.

• WBH20 CBN for hard, wear-intensive machining
• Trigon 80° form for versatile cutting geometry
• 0° negative rake for robust edge stability
• Corner radius 0.8 mm for consistent surface finish

Greater productivity on hardened steels with CBN technology

The combination of a CBN cutting material and the WBH20 grade targets demanding hard-turning operations where tool life and repeatability matter. Designed to tackle hardened steels, the insert provides a stable cutting edge under high contact stresses, reducing unexpected tool changes and downtime. The high wear resistance of the CBN grade supports longer uninterrupted runs and, in many setups, improved overall process economy thanks to fewer regrinds and predictable performance.

Geometry that secures repeatable surface quality

The Trigon 80° form and a 0° negative rake give the insert a forgiving seating angle and strong cutting edge, which helps maintain consistent chip flow and surface integrity in heavy-duty cuts. A corner radius of 0.8 mm reduces microchatter and supports a reliable finish on turned components. The presence of chipbreaker 3 further assists in breaking chips into manageable segments, lowering the risk of long, entangling swarf and improving operator safety in continuous production.

Clear material range and application focus

This grade is especially suited for machining tasks classified under the ISO group for hardened materials (H). It is applicable for hardened and pre-hardened steels, where standard carbide inserts can show elevated wear. The insert’s specification supports operations such as hard turning, finishing of heat-treated components and applications where dimensional stability over tool life is essential. Where applications approach superalloy or abrasive cast situations, application-specific trials are recommended due to the demanding nature of those alloys.

Stable process, easier planning, fewer interruptions

Tolerance class G and the standardised ISO designation ensure predictable interchangeability and simple tool management in automated cells and manual lathes alike. The robust geometry and CBN composition contribute to process stability, allowing production planning with more reliable tool-change intervals. For users aiming to reduce variability in serial production, this insert offers a material-appropriate solution that balances life and performance without frequent operator intervention.

For hardened material applications, request cutting parameter recommendations or technical documentation from Metav Werkzeuge — Metav Werkzeuge can provide tailored advice and fast availability via info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: WNGA080408TM-3-WBH20-WALTER
• ISO designation: WNGA080408TM-3 WBH20
• Product type: Drehwendeschneidplatte (turning insert)
• Brand: Walter Tools
• Series: Walter CBN / Hartstoff
• Grade: WBH20

Facts

• Insert form angle: 80° (Trigon)
• Rake angle: 0° (negative)
• Corner radius: 0.8 mm
• Size designation: 08
• Thickness designation: 04

Special features

• CBN cutting material (CBN grade WBH20)
• Designed for hardened steels (H)
• Suitable for pre-hardened steel operations
• Chipbreaker: 3
• Tolerance class: G

FAQ

What materials is this insert intended for?
This insert is specified for hardened steels (ISO group H) and is suitable for pre-hardened steel applications; the WBH20 CBN grade is optimised for wear-resistant hard machining.

How does the Trigon 80° form affect cutting performance?
The Trigon 80° geometry provides a robust cutting edge and flexible approach angles, helping to maintain edge stability and enabling consistent surface quality in hard-turning tasks.

Why choose a 0° negative rake for these operations?
A 0° negative rake increases edge strength and resistance to chipping during heavy cuts, which is particularly beneficial when machining hardened materials that impose high mechanical stresses on the insert.

What role does the corner radius play in finish and tool life?
The 0.8 mm corner radius supports improved surface finish and reduces the tendency for microchatter, contributing to longer effective tool life in finishing and semi-finishing passes.

Is this an original Walter Tools product and how is it identified?
The product is an original factory-new Walter Tools insert identified as WNGA080408TM-3 WBH20; the SKU is WNGA080408TM-3-WBH20-WALTER and the grade is part of the Walter CBN / Hartstoff series.

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

Protected trademarks and trade names are the property of their respective owners. Brand names and trademarks are mentioned solely for explanation. There is no connection between our company and the named brands. The offered article is an original, factory-new product of the manufacturer.