SNGA120408TM-4 WBH30 A Wendeplatten - Walter Tools

High wear resistance and dimensionally stable cutting behaviour from the WBH30 CBN grade, combined with a robust square 90° geometry and 0.8 mm corner radius, delivers consistent performance in hard-turning operations; order directly via Metav Werkzeuge or contact the consultants for cutting data and availability.

SNGA120408TM-4 WBH30 – Square CBN turning insert, 90°, for hardened steels (Walter Tools)

The SNGA120408TM-4 WBH30 is a square CBN turning insert engineered for hard turning of heat-treated and pre-hardened steels in demanding production environments.

• CBN grade WBH30 for hard-material turning
• Square 90° geometry with 0.8 mm corner radius
• Negative rake 0° for robust cutting edge
• Suitable for hardened steels and pre-hardened alloys

High-performance CBN grade for sustained productivity

The insert’s WBH30 grade is a CBN-based cutting material developed for the abrasion-intensive demands of hard machining. CBN provides superior wear resistance and thermal stability compared with conventional ceramics or carbide grades, which translates into longer tool life and fewer indexings in serial production. For shop floors that process heat-treated components, the combination of a CBN cutting edge and a stable chipformer reduces flank wear and maintains consistent dimensional accuracy, helping to lower overall machining costs through fewer interruptions and predictable tool-change intervals.

Geometry engineered for process security and surface quality

A square 90° configuration with a 0.8 mm corner radius and a 0° (negative) free angle delivers a strong cutting edge that tolerates interrupted cuts and high radial loads. The defined chipbreaker design (type 4) promotes controlled chip flow during hard turning, improving surface finish and minimising thermal damage. The compact plate thickness and the insert’s tolerance class G ensure repeatable seating and reliable clamping forces in suitable toolholders, so the machining process remains stable even under elevated cutting pressures—leading to reproducible part quality and reduced scrap rates.

Application advantages and straightforward integration in production

Belonging to the Walter CBN / hard-material series, this square insert is targeted at turning operations on hardened steels and pre-hardened workpieces where high hardness and severe tooling demands occur. The robust edge preparation and CBN composition help to achieve consistent surface integrity on treated components and to maintain cutting performance across batch runs. Integration into existing turning systems is straightforward when the correct toolholder and cutting data are selected; for complex or unusual alloys, consultation on cutting parameters and edge life optimisation is recommended to maximise the benefits of the CBN grade.

For demanding hard-turning tasks consider the Walter Tools SNGA120408TM-4 WBH30; contact Metav Werkzeuge for tailored cutting data, availability and ordering at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical Data

• Article number: SNGA120408TM-4-WBH30-WALTER
• ISO designation: SNGA120408TM-4 WBH30
• Series: Walter CBN / Hartstoff
• Grade: WBH30
• Manufacturer: Walter Tools

Facts

• Size: 12
• Thickness: 04
• Corner radius: 0.8
• Free angle: 0° (negative)
• Chipbreaker: 4
• Tolerance class: G
• Shape: Square 90°

Special features

• CBN cutting material
• Suitable for hardened steels
• Suitable for pre-hardened steel
• Suitable for steel
• Execution: A
• Material code: H
• Series name: Walter CBN / Hartstoff

FAQ

What workpiece materials are best suited to this insert?
The SNGA120408TM-4 WBH30 is designed primarily for hardened steels and pre-hardened alloys; its CBN composition provides the required wear resistance for such materials.

How does the 0.8 mm corner radius affect cutting performance?
A 0.8 mm corner radius increases edge strength and improves surface integrity, making the insert particularly effective for interrupted cuts and higher radial engagement.

What does the WBH30 designation mean?
WBH30 denotes a Walter CBN grade optimised for hard machining tasks, offering high abrasion resistance and thermal stability for consistent tool life.

Can this insert be used for finishing passes?
Yes—the stable edge geometry and chip control make the insert suitable for finishing operations on hardened components, where a good surface finish and dimensional control are required.

Is special tooling required to use this insert?
Standard toolholders compatible with the SNGA insert family and correct clamping to the specified tolerance class G are sufficient; matching cutting data to the workpiece hardness is important to achieve optimal life.

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

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