CNGA120412TM-2 WBH20 Wendeplatten - Walter Tools

The combination of CBN cutting grade WBH20, a rhombic 80° geometry and a robust 1.2 mm corner radius delivers a stable cutting edge and long tool life for hard turning operations; the negative 0° rake further enhances edge security for high cutting forces. Order the CNGA120412TM-2 WBH20 indexable turning insert directly via Metav Werkzeuge or ask our consultants if needed.

CNGA120412TM-2 WBH20 indexable turning insert – Walter Tools with CBN grade for hard machining

CNGA120412TM-2 WBH20 is an indexable turning insert designed for hard machining applications, offering a CBN-based grade for stable performance on hardened steels.

• CBN grade WBH20 for hard turning
• Rhombic 80° geometry for versatile use
• 0° negative rake for cutting stability
• 1.2 mm corner radius for robust edge life

Reliable performance for machining hardened steels

The CBN-based grade WBH20 is engineered specifically for hard machining, providing exceptional wear resistance when milling or turning hardened steels. As a CBN insert, it maintains cutting-edge integrity at elevated temperatures and under high contact pressures, which reduces the frequency of insert changes and contributes to more consistent production output. The result is improved process stability and more predictable tool life compared with conventional carbide grades when tackling high-hardness materials.

Geometry and edge design that increase process security

The rhombic 80° geometry combined with a 1.2 mm corner radius produces a mechanically stable cutting edge that resists chipping during interrupted cuts or heavy engagement. The 0° negative rake promotes a robust cutting action by lowering the tendency for edge deformation under high forces, supporting secure clamping and repeatable positioning in standard indexable toolholders. Together, these design elements enhance surface finish consistency and reduce the likelihood of unexpected tool failure.

Practical benefits for workshop productivity

With a designation of CNGA120412TM-2 in the Walter CBN series, this indexable insert suits operations where hardness and abrasion are primary challenges. The tolerance class G indicates consistent manufacturing accuracy for repeatable indexation and seating in toolholders. For manufacturers processing pre-hardened or through-hardened components, this insert offers a balance of productivity and longevity that can lower tooling-related downtime and simplify process planning without sacrificing component quality.

For wear-critical turning tasks, consult Metav Werkzeuge to evaluate the CNGA120412TM-2 WBH20 insert for specific applications and secure production-ready supplies through Metav Werkzeuge

Technical data

• Article number: CNGA120412TM-2-WBH20-WALTER
• Designation: CNGA120412TM-2 WBH20
• Series: Walter CBN / Hartstoff
• Grade: WBH20

Facts

• Shape: Rhombus 80°
• Size: 12
• Thickness: 04
• Corner radius: 1.2 mm
• Rake angle: 0° (negative)
• Chipbreaker: 2
• Tolerance class: G

Special features

• CBN cutting material for hard machining
• Suitable for hardened steels (H)
• Indexable turning insert type
• Designed for process stability and wear resistance

FAQ

Is this insert suitable for finishing hardened steels? The CNGA120412TM-2 WBH20 insert uses a CBN grade optimised for hard machining, so it is suitable for finishing and semi-finishing operations on hardened steels where wear resistance and edge stability are required.

What advantages does the 0° negative rake offer? A 0° negative rake on the CNGA120412TM-2 provides a stronger cutting edge and better resistance to deformation under high cutting forces, enhancing process reliability during heavy engagement or interrupted cuts.

Which component geometries benefit most from the rhombic 80° shape? The rhombic 80° geometry is versatile for straight and profiling turns, offering effective relief angles for shoulder work and external turning with good approach flexibility using the CNGA120412TM-2 insert.

How does the 1.2 mm corner radius affect tool life and surface finish? The 1.2 mm corner radius on this CBN insert increases edge robustness and distribution of cutting forces, improving tool life and helping to maintain consistent surface finish on hardened materials.

What material groups is this insert intended for? This insert is specified for hardened steels (designation H) and is particularly effective for pre-hardened and through-hardened components where conventional grades would wear prematurely.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen, Germany, info@walter-tools.com

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