CNMG 120408 T9235 Wendeplatten - Tungaloy

Take advantage of the combination of a CVD-coated carbide grade optimised for steel, a 0.8 mm corner radius and the ISO CNMG geometry for reliable external and internal turning under interrupted cuts; order directly via Metav Werkzeuge or request specialist advice from our consultants.

CNMG 120408 T9235 indexable insert for turning — Tungaloy, CVD-coated carbide, 0.8 mm radius

A CNMG 120408 T9235 indexable turning insert designed for external and internal turning of steel, featuring a rhombic form with a 0° clearance angle and an 80° cutting angle for stable chip control.

• CNMG 120408 form, ISO‑standard
• CVD-coated carbide grade T9235
• 0.8 mm corner radius for versatile turning
• Double-sided chipbreaker, cylindrical hole

Stable performance for interrupted and unstable cuts

The rhombic geometry with an 80° cutting angle and a 0.8 mm corner radius delivers a productive compromise between strength and profile accuracy. In practice, this means predictable tool life and consistent wall finish when machining steels under variable stability. The CVD-coated carbide substrate reduces flank wear and maintains edge stability, which is particularly beneficial where the process includes frequent interruptions or variable clamping conditions. The result is fewer tool changes and more uninterrupted production time.

Coating and grade tuned to steel machining

The insert’s T9235 grade combines a tough, wear‑resistant carbide with a CVD coating that is engineered for low cutting speeds and demanding, interrupted operations. This combination provides enhanced resistance to chipping and thermal degradation during heavy engagement, making it suitable for roughing and mixed finishing passes in steel. The coating also improves resistance to built‑up edge formation, which contributes to consistent part quality and reduced rework.

System compatibility and secure clamping

Compatibility with the toolholder is defined by the insert form, clearance angle, tolerance class, attachment method, size and thickness. The CNMG120408 design includes a cylindrical hole for positive locating and a standard thickness of 4.76 mm, enabling secure clamping in a wide range of external holders and boring bars. For a complete setup, use the right outerholder or bar together with an appropriate underlay/clamp set and replacement screws to preserve repeatability and reduce mounting errors.

Practical benefits on the shop floor

Using a double‑sided insert with a reliable chipbreaker reduces tooling consumption per part and simplifies inventory management. The double‑sided chipbreaker extends usable cutting edges and supports efficient chip formation for steel, lowering the frequency of indexings. The rhombic form also allows economical use across different turning tasks, helping to maintain throughput without compromising surface integrity.

Choosing the right insert for the job

Select the matching chipbreaker and grade based on workpiece material, machining strategy and machine stability. For steel turning under unstable conditions or frequent interruptions, the T9235 grade offers a robust balance of toughness and wear resistance. When combined with ISO‑standard CNMG geometry and correct clamping, this insert provides a dependable, economical solution for routine and demanding turning operations.

For reliable steel turning with proven edge security, contact Metav Werkzeuge for technical guidance or to order the Tungaloy CNMG120408 T9235 insert; email info@metav-werkzeuge.com or call +49 2822 7131930 to speak with a specialist.

Technical Data

• Article number: 6785980
• Manufacturer SKU: TUN6785980
• Material: Hartmetall
• Manufacturer: Tungaloy

Facts

• Inscribed circle: 12 mm
• Corner radius: 0.8 mm
• Thickness: 4.76 mm
• Clearance angle: 0°
• Cutting angle: 80°
• Hole: with hole
• Hole style: cylindrical

Special features

• CVD-coated grade T9235
• Rhombic plate form (CNMG)
• Double-sided chipbreaker
• ISO-standard turning insert
• Compatible with matching holder, underlay/clamp set and replacement screws

FAQ

What materials is this insert optimised for?
The CNMG120408 T9235 insert is optimised for machining steel; the T9235 grade and CVD coating favour toughness and wear resistance in steel turning applications.

Can this insert be used for both external and internal turning?
Yes, the rhombic CNMG geometry and the cylindrical locating hole make the insert suitable for both external and internal turning when used with the appropriate holder or boring bar.

How does the T9235 grade behave under interrupted cuts?
The T9235 grade is formulated for toughness and resistance to chipping, so it performs well in interrupted and unstable cutting conditions typical of heavy roughing.

What are the key dimensions to check for holder compatibility?
Check the CNMG form, inscribed circle (12 mm), thickness (4.76 mm), corner radius (0.8 mm) and the clearance angle to ensure correct fit and clamping.

Is the chip control suitable for finishing passes?
The double-sided chipbreaker offers effective chip control across a range of feeds; it can be used for mixed finishing and roughing, but final surface requirements may determine the optimal chipbreaker style.

Manufacturer/Responsible: Tungaloy-NTK Germany GmbH, Katzbergstraße 3a, 40764 Langenfeld - Protected trademarks and product names are the property of their respective owners. Brand names and protected trademarks are mentioned solely for explanatory purposes. There is no affiliation between our company and the mentioned brands. The item offered is an original, brand-new product from the manufacturer.