CNMG 120408 T5115 Wendeplatten - Tungaloy

Take advantage of the combination of CVD‑coated carbide durability, a stable 80° rhombic geometry, and simple compatibility checks for reliable turning performance; order inserts via Metav Werkzeuge or request expert advice when holder compatibility needs confirmation.

CNMG 120408 T5115 – Turning indexable insert by Tungaloy (CVD-coated, ISO CNMG)

CNMG120408 T5115 is an ISO‑normed indexable insert for external and internal turning, designed as a rhombic CNMG insert optimised for cast iron machining.

• CVD-coated carbide grade T5115
• Optimised for cast iron machining
• ISO CNMG 120408 rhombic insert
• Double-sided design with cylindrical hole

Consistent chip control and extended tool life

The CVD‑coated carbide composition of the T5115 grade provides a balanced combination of wear resistance and edge stability, resulting in predictable performance during interrupted and continuous cuts. As a universal grade for cast iron, this coating optimises the contact between workpiece and tool, reducing flank wear and maintaining cutting geometry for longer periods. The result is fewer indexings per component and a reduction in unplanned tool changes, which contributes directly to improved process efficiency on the shop floor.

Geometry engineered for precision and surface quality

With an 80° lead geometry in the rhombic CNMG form and a 0° relief angle, the insert delivers a reliable cutting direction and stable engagement in both external and internal turning operations. The 0.8 mm corner radius and 4.76 mm thickness support consistent chip formation and a robust cutting edge, enabling repeatable surface finishes and dimensional control. These geometric features reduce vibration sensitivity and allow for tighter tolerance keeping in serial production, translating technical specifications into measurable productivity gains.

Compatibility, system setup and practical benefits

Compatibility with a given holder is determined by insert form, relief angle, tolerance class, fastening method, size and thickness; the ISO CNMG designation allows easy cross‑referencing with standard external holders or boring bars. The system comprises the insert, a suitable external holder or boring bar, a shim/clamp set and replacement screws. The double‑sided design with a cylindrical hole provides secure fixing and economical edge utilisation. For project planning and fixture checks, Metav Werkzeuge can supply matching holder recommendations and assembly advice to ensure rapid integration into existing toolsets.

Application advice for machining cast iron

For cast iron operations, select the double‑sided chipbreaker configuration and the T5115 grade to achieve stable chip evacuation and consistent surface integrity. The insert’s properties favour medium to heavy roughing and semi‑finishing passes where a balance between edge life and cutting force is required. Where fine surface finish is essential, adjust feed and depth to exploit the 0.8 mm radius while maintaining coolant and clamping stability. This approach reduces scrap rates and supports predictable cycle times, enhancing overall process reliability and operator confidence.

Contact Metav Werkzeuge for tailored holder matching, stock status and application recommendations for the Tungaloy CNMG 120408 T5115 insert

Technical Data

• Article number: 6850129
• Manufacturer SKU: TUN6850129
• Vendor SKU: 6850129-Tungaloy
• Model series: ISO-Drehwendeschneidplatten

Facts

• Cutting angle: 80°
• Thickness: 4.76 mm
• Insert size: 12 mm
• Corner radius: 0.8 mm
• Relief angle: 0°

Special features

• Material: carbide
• Coating / grade: T5115 (CVD-coated carbide)
• Chipbreaker: double-sided
• Hole: with cylindrical hole
• Insert form: rhombic (CNMG)
• Application: turning (external and internal)

FAQ

Is the CNMG120408 T5115 suitable for finishing cast iron components?
The CNMG120408 T5115 insert, with its CVD coating and controlled corner radius, is suitable for semi‑finishing and finishing cast iron when feed and depth are adjusted for the desired surface quality.

How does the insert secure to the holder?
The insert features a cylindrical hole and is designed for clamping with a shim or clamp set in compatible ISO CNMG holders; the double‑sided layout allows economical use of both cutting edges.

What distinguishes the T5115 grade from other grades?
T5115 is a universal CVD‑coated carbide grade optimised for cast iron, offering a balanced trade‑off between wear resistance and edge stability for productive machining.

Does the insert work for internal turning as well as external turning?
Yes, the ISO CNMG geometry and the specified dimensions are suitable for both external and internal turning applications when paired with the appropriate boring bar or internal holder.

Which parameters should be prioritised to extend tool life with this insert?
Prioritise stable clamping, correct holder support, and cutting parameters matched to the cast iron grade; the T5115 coating and robust geometry will then deliver extended edge life and consistent results.

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.