CNMG 120408 GH330 Wendeplatten - Tungaloy

Take advantage of a GH330-grade carbide insert with a proven rhombic 80° geometry and a 0.8 mm corner radius to secure consistent edge life and stable chip formation during turning operations. Order directly via Metav Werkzeuge or consult our specialists for tailored recommendations.

CNMG 120408 GH330 ISO indexable insert for turning — Tungaloy

The CNMG 120408 GH330 is an ISO‑standard rhombic indexable insert engineered for external and internal turning, offering a balanced combination of wear resistance and edge stability for productive metalcutting.

• GH330 grade for wear resistance and toughness
• Rhombic ISO shape with 80° cutting angle
• 0.8 mm corner radius for consistent edge life
• Cylindrical hole for secure, repeatable clamping

Delivering predictable cutting performance for series production

The rhombic ISO geometry delivers a robust 80° cutting edge that improves stability under interrupted cuts and light finishing passes. The insert’s 0.8 mm corner radius smooths engagement with the workpiece, reducing vibration and helping to maintain surface quality across batches. Manufactured from cemented carbide, the body provides high hardness and heat resistance, while the GH330 grade balances wear resistance and toughness, meaning fewer unexpected tool changes and more predictable process planning. For production planners, this translates directly into more stable cycle times and consistent part tolerances.

Simple integration with holders and secure clamping for repeatable results

Compatibility with toolholders depends on the insert’s form, clearance angle, tolerance class, clamping method, size and thickness; the CNMG120408 follows ISO conventions to make matching straightforward. The cylindrical hole and standard seat geometry permit secure retention in clamping systems used on many external holders and boring bars, and the insert thickness of 4.76 mm gives reliable engagement for axial and radial forces. The insert is intended to be used as part of a system — indexable insert, matching external holder or boring bar, shim/clamp set and replacement screws — ensuring quick changeovers and consistent repositioning for repeatable machining.

GH330 grade and chip control for versatile turning applications

The GH330 Tungaloy grade combines optimised wear properties with sufficient toughness to resist chipping on unstable cuts, making it suited to general turning tasks where a balance of life and edge integrity is required. The integrated double-sided chipbreaker geometry assists controlled chip formation in a range of steels and common ferrous materials during both roughing and finishing. Where process reliability is critical, the combination of carbide substrate and this grade supports longer tool life and reproducible surface finishes, reducing unplanned downtime and simplifying tool inventory management.

For precision turning with GH330-grade inserts, contact Metav Werkzeuge for availability and application advice: info@metav-werkzeuge.com or +49 2822 7131930

Technical data

• Article number: 6802109
• Manufacturer SKU: TUN6802109
• SKU: 6802109-Tungaloy
• Model series: ISO turning indexable inserts

Key dimensions

• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Cutting angle: 80°
• Free angle: 0°

Materials and features

• Material: cemented carbide
• Grade: GH330 (Tungaloy)
• Hole: with hole — cylindrical hole
• Chipbreaker: double-sided
• Shape: rhombic
• Application: Turning (external and internal)

FAQ

What materials is this insert intended to machine?
The GH330‑grade CNMG120408 insert is designed for general turning tasks and is suitable for a broad range of ferrous materials where a balance of wear resistance and toughness is required.

How does the 0.8 mm corner radius affect machining?
A 0.8 mm corner radius reduces vibration and distributes cutting forces over a larger edge, improving surface finish and increasing edge life compared with a smaller radius in comparable conditions.

Which holder features are required for correct fitment?
Correct fitment depends on holder form, clearance (free) angle, tolerance class, clamping style, insert size and thickness; the ISO standard for CNMG inserts simplifies selection of compatible external holders and boring bars.

What benefits does the GH330 grade provide?
The GH330 Tungaloy grade offers a compromise between wear resistance and toughness, helping to prevent premature chipping while maintaining reasonable tool life under varied turning conditions.

Is the insert suitable for interrupted cuts and finishing passes?
Yes; the rhombic 80° geometry and the carbide substrate provide stability for interrupted cuts, while the corner radius and chipbreaker support good surface quality in finishing operations.

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.