CNMG 120408 T5125 Wendeplatten - Tungaloy

Take advantage of the combination of CVD-coated cemented carbide, a tough T5125 grade optimised for cast iron, and ISO compatibility for consistent tool changes; suitable for interrupted cuts and less stable turning conditions. Order or request advice via Metav Werkzeuge for application support and fast supply.

CNMG 120408 T5125 ISO turning insert by Tungaloy — rhombic geometry, CVD-coated

A CNMG120408 T5125 ISO turning insert designed for external and internal turning, optimised for cast iron and interrupted cuts

• CVD-coated cemented carbide grade T5125
• Designed for cast iron and interrupted cuts
• ISO CNMG 120408 rhombic insert geometry
• Cylindrical hole, 0° clearance, 0.8 mm radius

Consistent cutting performance where interruptions occur

The CVD-coated composition together with the T5125 grade delivers a tougher cutting edge designed to withstand shock and vibration during interrupted cuts. This makes the indexable plate particularly suitable for the machining of cast iron under less stable conditions, where a more ductile grade prevents premature chipping and supports longer in‑service life. The combination of coating and substrate aims to balance wear resistance with edge strength, resulting in dependable performance across a wide range of turning operations.

ISO conformity for rapid tool changes and predictable set-up

Being part of an ISO turning indexable insert series, compatibility with holders is ensured through standardised form, clearance, tolerance class, clamping and thickness. This standardisation reduces set‑up time and limits sources of variability in production. The rhombic geometry and defined approach angle support repeatable engagement with a variety of external holders or boring bars, enabling a straightforward swap of inserts while maintaining process stability and component tolerances.

Improved chip control and edge reliability for finishing and roughing

The insert’s double-sided chipbreaker and rhombic shape promote effective chip formation and evacuation, reducing the risk of recutting and improving surface quality. The 0.8 mm corner radius supports robust cutting edges for roughing while still enabling decent finishing capability when required. The 80° approach angle and 0° clearance influence cutting forces and contact conditions, helping to balance tool life and workpiece integrity on interrupted or less rigid set-ups.

Application guidance to maximise productivity

Selection of chipbreaker and grade should match the workpiece material, cutting parameters and machine rigidity; the tougher substrate of this plate is recommended where shock loads occur. Where steady finishes are required, consider a smaller corner radius or adapted feed values; for heavy interrupted cuts, the T5125 grade helps maintain edge integrity. The insert’s cylindrical hole and standard dimensions simplify mounting and indexing, enabling economical multi‑edge use and predictable replacement intervals to support uninterrupted production.

Contact Metav Werkzeuge for tailored application advice and fast delivery of Tungaloy CNMG120408 T5125 inserts; phone +49 2822 7131930 or email info@metav-werkzeuge.com

Technical data

• Article number: 6852909
• Manufacturer SKU: TUN6852909
• Model series: ISO turning indexable insert series
• Manufacturer: Tungaloy

Core data

• Corner radius: 0.8 mm
• Thickness: 4.76 mm
• Inscribed circle / size: 12 mm
• Approach angle: 80°
• Clearance angle: 0°
• Hole style: cylindrical

Special features

• CVD-coated cemented carbide
• Grade T5125
• Double-sided chipbreaker
• Rhombic insert shape
• With hole (for secure clamping)
• Intended application: turning
• Optimised for cast iron and interrupted cuts
• Compatibility determined by form, clearance, tolerance class, clamping, size and thickness

FAQ

Is this insert suitable for machining cast iron? Yes. The Tungaloy CNMG120408 T5125 insert is a CVD-coated cemented carbide grade specifically intended for cast iron, offering improved toughness for interrupted cuts.

Can the insert be used for both external and internal turning? Yes. The ISO CNMG geometry and cylindrical hole allow mounting in compatible external holders and boring bars for both external and internal turning tasks.

What does the T5125 grade deliver compared with harder grades? The T5125 grade prioritises edge toughness and stable chip formation in less rigid conditions, making it preferable where interruptions or variable clamping could otherwise produce edge chipping.

How does the 0.8 mm corner radius affect performance? A 0.8 mm corner radius increases edge strength and resistance to shock, which benefits roughing and interrupted operations while maintaining acceptable surface quality.

Is the insert indexable on both sides? Yes. The insert features a double-sided chipbreaker, allowing indexing to a fresh cutting edge to extend overall tool life.

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.