CNMG 120408 T5115 Wendeplatten - Tungaloy

Reliable chip control and a CVD‑coated carbide core deliver consistent surface quality and extended tool life; the ISO CNMG120408 geometry with a 0.8 mm corner radius provides robust edge stability for productive cast iron turning. Order the insert directly via Metav Werkzeuge or consult our specialists for application-specific parameters.

CNMG120408 T5115 Tungaloy indexable insert for turning — CVD-coated carbide, rhombic 80°

The CNMG120408 T5115 is an ISO‑format rhombic indexable insert engineered for external and internal turning, offering balanced wear resistance and stable chip formation for cast iron machining

• ISO CNMG 120408 format
• CVD-coated carbide T5115
• Double-sided chipbreaker, rhombic
• Cylindrical hole for screw clamping

Consistent turning performance with a wear‑resistant coating

The combination of CVD‑coated carbide and the T5115 grade results in a cutting edge that retains stability under interrupted cuts and varying process loads. The coating enhances wear resistance while maintaining an edge geometry that is forgiving during light to medium interrupted cuts, which is particularly beneficial when machining cast iron. The double-sided chipbreaker promotes controlled chip formation and evacuation, reducing the risk of built-up edge and improving process reliability. Thanks to the 0.8 mm corner radius and the 80° rhombic geometry, the insert offers a good compromise between strength and accessibility in shoulder and profiling operations.

Clear compatibility rules and secure clamping for predictable results

Compatibility with a toolholder is determined by form, relief angle, tolerance class, fastening method, size and thickness; the insert is designed for standard ISO CNMG pockets and should be used with a corresponding external holder or boring bar, plus the required underlay/clamping set and replacement screws. The cylindrical hole supports screw clamping and ensures repeatable seating when mounted in a pocket designed for CNMG inserts. This design simplifies tool changeovers and helps maintain process accuracy across batches; the specified plate thickness 4.76 mm and size 12 are critical dimensions to match when selecting the holder.

Economic operation through reversible edges and stable process behaviour

The reversible, double‑sided design offers multiple usable cutting edges per insert, reducing the tool cost per cutting edge and lowering tooling inventory needs. The CVD coating aids in extending edge life under abrasive conditions typical of many cast iron grades, while the balanced grade formulation supports stable chip formation and predictable flank wear. For production environments aiming to optimise spindle time and reduce interruptions, this insert delivers tangible economy: fewer indexings, less setup time and repeatable results across runs. The result is improved throughput with sustained surface quality and reproducible tool life.

Contact Metav Werkzeuge for tailored cutting data and to request the Tungaloy CNMG120408 T5115 indexable insert for efficient cast iron turning

Technical data

• Article number: 6735863
• Manufacturer SKU: TUN6735863
• SKU: 6735863-Tungaloy
• Designation: CNMG120408
• Model series: ISO indexable turning inserts
• Material: carbide
• Grade: T5115
• Manufacturer: Tungaloy

Core dimensions

• Size: 12
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Relief angle: 0°
• Included angle: 80°

Features

• Rhombic (CNMG) shape
• Double-sided chipbreaker
• Cylindrical hole, screw clamping
• CVD-coated carbide, grade T5115
• Suitable for external and internal turning
• ISO compatibility: CNMG 120408

FAQ

What materials is this insert best suited for?
The CNMG120408 T5115 insert is formulated as a universal grade for cast iron, offering a balance of wear resistance and edge stability that makes it suitable for a wide range of grey and nodular cast irons.

Can the insert be used for internal turning as well as external turning?
Yes — when paired with a suitable boring bar or internal holder that matches the ISO CNMG pocket and the insert dimensions, the CNMG120408 T5115 can be used for internal turning as well as external operations.

What advantages does the CVD coating provide on this grade?
The CVD coating on the T5115 grade increases abrasive wear resistance and supports longer edge life under the thermal and mechanical stresses typical of cast iron machining, which contributes to more consistent component quality.

How is the insert secured in the holder?
The insert features a cylindrical hole for screw clamping; correct use of the matching underlay, clamping set and screws ensures repeatable seating and secure fixation in ISO CNMG pockets.

How many useful cutting edges are available with this design?
The reversible, double‑sided format provides multiple cutting edges per insert, enabling several indexings before replacement and delivering economic advantages in production environments.

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.