CNMG 120408 T5125 Wendeplatten - Tungaloy

Taking advantage of a CVD-coated carbide grade designed for demanding cast-iron turning and the ISO CNMG120408 geometry, this insert delivers reliable chip control and consistent performance in interrupted cuts; order directly via Metav Werkzeuge or consult our team for application advice.

CNMG 120408 T5125 Turning insert (ISO CNMG120408) by Tungaloy — CVD-coated carbide, rhombic form

The CNMG120408 T5125 Tungaloy insert is an ISO-standard rhombic turning insert for external and internal turning, engineered for cast-iron machining under interrupted or less-stable conditions.

• CVD-coated carbide for interrupted cuts
• Optimised for cast iron machining
• Rhombic ISO CNMG 12 mm form
• Double-sided chipbreaker, cylindrical hole

Stable chip control for interrupted turning

The combination of a CVD-coated surface and the T5125 grade provides a tougher cutting edge that improves chip formation during intermittent cutting. This grade was developed for less stable setups and interrupted cuts, so the insert maintains edge integrity where brittle grades would fail. As a result, the machining process benefits from fewer edge failures and longer tool life, which supports steady production and predictable planning.

Clear compatibility and secure clamping for workflow reliability

As an ISO-design insert, fit depends on the toolholder’s seat for CNMG geometry; mounting compatibility is determined by the insert form, 0° relief angle, tolerance class, clamping style, overall 12 mm size, and 4.76 mm thickness. The rhombic form with a cylindrical hole enables reliable double-sided indexing and secure fastening with the appropriate clamping set and mounting screws, reducing setup variation and minimising unplanned stoppages.

Material and coating advantages for robust performance

Manufactured from carbide and finished with a CVD-coated layer, the insert balances wear resistance and toughness. The T5125 grade is tailored to handle interrupted loads and the abrasive nature of cast iron, delivering stable chip formation and extended edge life compared with uncoated or harder, more brittle grades. For operations where stability is limited by fixture or machine rigidity, this choice reduces the risk of chipping and improves process repeatability.

Productivity and process benefits in everyday turning

Using an ISO CNMG insert with a 0.8 mm corner radius helps achieve a favourable compromise between strength and surface finish: the radius supports higher feed rates while still permitting acceptable workpiece quality. The double-sided chipbreaker aids chip control in both roughing and finishing passes, which can cut cycle times and reduce manual chip handling. For production environments prioritising uptime and consistent component tolerance, the insert provides a pragmatic balance of performance and economy.

For machining solutions using Tungaloy’s T5125 grade and ISO CNMG geometry, contact Metav Werkzeuge for tailored recommendations or technical data — email info@metav-werkzeuge.com or call +49 2822 7131930 to discuss suitability for specific turning operations.

Technical data

• Manufacturer article number: 6850130
• SKU: 6850130-Tungaloy
• Manufacturer SKU: TUN6850130

Core data

• Corner radius: 0.8 mm
• Thickness: 4.76 mm
• Size: 12 mm
• Lead/approach angle: 80°
• Relief angle: 0°

Special features

• ISO designation: CNMG120408
• Grade/coating: T5125, CVD-coated carbide
• Shape: rhombic
• Hole: with cylindrical hole
• Chipbreaker: double-sided
• Intended application: Turning (external and internal)

FAQ

Is this insert suitable for cast-iron workpieces?
Yes. The CNMG120408 T5125 Tungaloy insert is optimised for cast-iron machining, especially under interrupted cutting conditions where a tougher grade improves reliability.

Which toolholders fit this insert?
Compatibility requires an ISO CNMG holder that accepts CNMG120408 geometry; matching depends on form, relief angle, tolerance class, clamping method, size (12 mm) and thickness (4.76 mm).

Can this insert be used for continuous turning of steel?
The T5125 grade is primarily specified for cast iron and interrupted cuts; for continuous steel machining, a grade optimised for steel would typically be recommended instead of this T5125 variant.

How does the double-sided chipbreaker help production?
The double-sided chipbreaker improves chip control in both roughing and finishing, reducing manual chip handling and aiding process stability during longer production runs.

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.