DNGA150408TM-2 WBH20 A Wendeplatten - Walter Tools

Take advantage of the combination of high wear resistance, stable chip control, and process reliability to keep hard turning operations productive and consistent; order the insert directly via Metav Werkzeuge or consult our specialists for application advice.

DNGA150408TM-2 WBH20 — Indexable Turning Insert (CBN) Rhombic 55° by Walter Tools

A DNGA150408TM-2 WBH20 indexable turning insert engineered for hard machining of hardened steels and similar high‑wear materials.

• CBN grade WBH20 for hard machining
• Rhombic 55° geometry for versatile engagement
• 0° (negative) relief for robust cutting action
• 0.8 mm corner radius for stable finishes

Consistent performance when machining hardened steels

The WBH20 CBN grade is designed specifically for high‑hardness applications, making the insert ideal for turning operations on hardened steels and similar materials. The grain structure of the CBN cutting material provides pronounced wear resistance and thermal stability, which translates into fewer tool changes and longer uninterrupted cutting times. By selecting a grade optimised for hard turning, process windows are widened and cycle consistency improves, helping to reduce rework and downtime in series production.

Geometry that improves stability and surface quality

A rhombic 55° shape combined with a 0° (negative) relief angle gives the insert mechanical strength at the cutting edge and predictable tool engagement. The moderate 0.8 mm corner radius supports a balance between edge robustness and surface finish, preventing premature chipping while producing repeatable Ra values in finishing passes. Together, the geometry and edge preparation enable controlled cutting forces and improved vibration resistance, which is particularly beneficial on older lathes or when clamping conditions are less than ideal.

Chip control and productivity in hard cutting

The integrated chipbreaker (type 2) is tuned to the behaviour of chips in hard machining, promoting fracture and efficient evacuation under higher cutting temperatures. The insert’s dimensions and 0.4 mm plate thickness contribute to secure seat fitment and minimise deformation under load. As part of the Walter CBN / Hartstoff series, this insert supports productive machining strategies: fewer interruptions for tool change, better process reliability and an overall improvement in throughput for components requiring hard turning.

Discuss specific application requirements with Metav Werkzeuge to ensure optimal selection of Walter Tools CBN inserts for hardened steel turning; contact Metav Werkzeuge for technical advice at info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: DNGA150408TM-2-WBH20-WALTER
• ISO designation: DNGA150408TM-2 WBH20
• Series: Walter CBN / Hartstoff
• Grade: WBH20

Numbers / Core technical data

• Size: 15
• Plate thickness: 0.4 mm
• Corner radius: 0.8 mm
• Relief angle: 0° (negative)
• Chipbreaker: 2
• Tolerance class: G

Designs / Special features

• Plate form: Rhombus 55°
• Material application: hardened steels (H)
• Suitable for pre‑hardened steel applications
• Execution: A

FAQ

What materials is this insert suited for?
The DNGA150408TM-2 WBH20 insert is tailored for hardened steels and similar high‑wear materials, utilising the WBH20 CBN grade for hard turning tasks.

How does the negative 0° relief affect cutting?
Negative 0° relief on the insert provides a robust cutting edge and improved mechanical strength, making the insert more tolerant of interrupted cuts and less prone to edge failure.

What benefits does the Rhombic 55° geometry offer?
Rhombic 55° geometry enables versatile engagement angles and reliable chip flow in turning operations, balancing rigidity with accessibility for various turning applications.

Manufacturer: Walter Deutschland GmbH; Derendinger Straße 53; 72072 Tübingen; Germany

The Walter AG (brand appearance: Walter Tools) is one of the world’s leading manufacturers of precision metal‑cutting tools and is part of the Sandvik Group. Protected trademarks and trade names are the property of their respective owners. Brand names and registered trademarks are mentioned solely for explanatory purposes; there is no affiliation between our company and the referenced brands. The offered item is an original, factory‑new product from the manufacturer.