CNMG 120408 T9215 Wendeplatten - Tungaloy

Combining the CVD‑coated carbide grade T9215, ISO CNMG 120408 geometry and a 0.8 mm corner radius yields a robust solution for productive medium‑steel turning with reliable chip control and extended tool life; order the CNMG120408 T9215 Tungaloy insert directly via Metav Werkzeuge or consult our specialists for application advice.

CNMG120408 T9215 CNMG turning insert by Tungaloy — CVD‑coated carbide, 0.8 mm corner radius

The CNMG120408 T9215 is an ISO‑standard rhombic turning insert designed for medium‑steel machining, combining a CVD‑coated carbide grade with a double‑sided chipbreaker for continuous and slightly interrupted cuts

• CVD‑coated carbide grade T9215
• ISO CNMG 120408 rhombic insert
• Double-sided chipbreaker, cylindrical hole
• 0.8 mm corner radius for stable cuts

Productivity uplift through optimised grade and coating

The CVD‑coated carbide composition of grade T9215 is tailored for medium‑steel applications where a balance of wear resistance and fracture toughness is required. This microstructural combination enables higher cutting parameters compared with uncoated grades, meaning parts per shift can increase without sacrificing insert life. The coating reduces flank wear and improves thermal stability, which in practical terms leads to fewer tool changes and a smoother production flow. For turning applications that demand repeatable results, this grade offers a clear efficiency advantage.

Reliable compatibility and concise clamping specifications

Designed to the ISO CNMG 120408 form, the insert matches standard CNMG holders when form, free angle, tolerance class, fastening, size and thickness align. The rhombic shape and 12 mm inscribed circle allow straightforward integration into common external and internal turning setups. Key dimensions such as 4.76 mm plate thickness, 0° clearance angle and 80° approach angle influence cutting behaviour: the geometry enhances rigidity and supports stable cutting forces, while the cylindrical hole ensures repeatable, secure clamping in indexable toolholders. This standardisation reduces setup complexity and supports interchangeability across compatible tool systems.

Consistent chip control and surface quality with modest setup

The double‑sided chipbreaker promotes controlled chip formation across a range of feeds and depths of cut, reducing the risk of long, tangled chips and helping to maintain process reliability. The 0.8 mm corner radius contributes to a favourable cutting edge strength that balances edge durability with achievable surface finish; a small radius reduces cutting forces while still resisting chipping under moderate interruptions. Together, chipbreaker design and edge radius lower vibration, extend productive cutting time and help achieve consistent part geometry, making the insert well suited to series production and small batch work alike.

Application guidance and process recommendations

For turning operations on medium‑strength steels, select feeds and speeds aligned with the grade’s thermal and mechanical resilience to exploit the T9215 benefits. The insert is suitable for continuous to slightly interrupted cuts; where interruptions become significant, adjust cutting parameters or consider alternative geometry/sort choices. Routine inspection of edge wear and proper clamping torque ensure secure performance and predictable insert life. If machining demands or materials vary, Metav Werkzeuge’s consultants can advise on matching chipbreaker style and cutting data to the specific application.

For availability, pairing advice or tailored recommendations for Tungaloy CVD inserts, contact Metav Werkzeuge — email info@metav-werkzeuge.com or call +49 2822 7131930 to secure CNMG120408 T9215 stock and application support

Technical Data

• Article number: 6774101
• Manufacturer SKU: TUN6774101
• Vendor SKU: 6774101-Tungaloy
• Brand: Tungaloy
• Model series: ISO turning inserts

Facts

• Size (inscribed circle): 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.8 mm
• Approach angle: 80°
• Clearance angle: 0°

Special features

• ISO designation: CNMG120408
• Grade / coating: T9215 (CVD‑coated carbide)
• Shape: rhombic
• Hole: with cylindrical hole
• Chipbreaker: double‑sided
• Material: carbide
• Application: Turning

FAQ

What workpieces is this insert best suited for?
The CNMG120408 T9215 insert is optimised for medium‑steel workpieces, offering a balance of wear resistance and toughness that suits continuous to slightly interrupted turning routines.

Will this ISO insert fit standard CNMG toolholders?
Compatibility with CNMG holders is expected for the CNMG120408 geometry, provided form, free angle, tolerance class, clamping method, size and thickness match the holder specifications.

How does the double‑sided chipbreaker influence machining?
The double‑sided chipbreaker on the CNMG120408 T9215 promotes uniform chip formation and evacuation, which improves process reliability and reduces downtime for chip management.

Can the insert be indexed to a fresh edge?
Yes, the insert is double‑sided and indexable; when one cutting edge reaches its wear limit, the part can be rotated to present a fresh edge, extending the usable life per insert.

What does the 0.8 mm corner radius change in practice?
A 0.8 mm corner radius provides enhanced edge strength for improved resistance to chipping and better surface finish control in medium‑steel turning, while keeping cutting forces moderate.

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.