CNMG 120408 T9205 Wendeplatten - Tungaloy

Take advantage of a CVD‑coated carbide grade that combines high wear resistance with reliable edge stability, and a 0.8 mm nose radius for consistent surface finish in production turning. Order the insert directly via Metav Werkzeuge or consult the technical team for matching holders and cutting data.

CNMG 120408 T9205 — Turning insert (ISO CNMG) by Tungaloy

A CNMG 120408 T9205 ISO rhombic turning insert for productive external and internal turning of steel, optimised for stable setups and higher cutting speeds

• CVD-coated carbide grade T9205
• 0.8 mm nose radius for fine finish
• Double-sided chipbreaker for versatility
• ISO rhombic 80° geometry with cylindrical hole

High productivity with proven carbide chemistry

The combination of a CVD‑coated carbide substrate and the T9205 grade delivers a wear‑resistant cutting edge designed for productive turning of steel under stable conditions. The coating improves thermal resistance and reduces flank wear, which supports extended tool life during medium to higher cutting speeds. For production environments seeking predictable performance, the coated grade reduces unscheduled insert changes and maintains surface quality across batches. Processing characteristics such as coating hardness and substrate toughness are selected to balance edge strength and resistance to abrasion, making this insert suited to sustained machining cycles.

Precise geometry for consistent surface quality

The rhombic 80° outline and the 0.8 mm nose radius produce a reproducible surface finish while maintaining cutting edge stability. The 0° relief angle and the insert’s geometry concentrate cutting forces in a way that favours rigidity; this is beneficial when using robust external holders or boring bars. The presence of a cylindrical hole and the ISO CNMG form ensures compatibility with standard CNMG toolholders; compatibility is determined by form, clearance angle, tolerance class, clamping method, size and thickness. Selecting the correct nose radius and holder support will reduce vibration and deliver repeatable part tolerances.

Flexible chip control and application guidance

The double‑sided chipbreaker is engineered for general‑purpose steel machining and simplifies inventory management by offering two usable cutting edges per side. For finishing and medium‑depth roughing, combine the T9205 grade with stable workholding and suitable cutting data to exploit the coated carbide’s strengths. When setting feeds and speeds, consider the workpiece grade and part rigidity: higher speeds play to the coating’s thermal resilience, while conservative feeds maintain edge life. For less experienced operators, starting with moderate parameters and increasing speed in steps is advised to find the optimal balance between productivity and tool life.

Mounting, compatibility and process integration

This ISO insert is intended for standard CNMG toolholders and fits into the common system build: insert, appropriate external holder or boring bar, shim/clamping kit and replacement clamping screws. The insert’s dimensions — 12 mm size, 4.76 mm thickness, and the 80° geometry — correspond to established ISO norms, facilitating straightforward replacement in existing tool assemblies. For series production, pairing the insert with a correctly rated holder and ensuring correct clamping torque will preserve insert life and part accuracy. When in doubt about holder selection or cutting data, technical consultation is recommended to avoid mismatches and downtime.

For production turning applications that demand repeatable performance, contact Metav Werkzeuge for availability, holder pairing and cutting‑data recommendations — Metav Werkzeuge can advise on the right assembly for the Tungaloy solution and supply matching accessories.

Technical Data

• Article number: 6785729
• Manufacturer SKU: TUN6785729
• Model series: ISO turning inserts
• Material: carbide

Facts

• ISO designation: CNMG 120408
• Size: 12 mm
• Plate thickness: 4.76 mm
• Nose radius: 0.8 mm
• Relief angle: 0°
• Geometry angle: 80°
• Hole: with hole (cylindrical)

Special features

• Grade/coating: T9205, CVD‑coated carbide
• Chipbreaker: double‑sided
• Plate shape: rhombic
• Typical application: turning steel
• Compatible system: ISO CNMG holders, shims and clamping sets

FAQ

What materials is this insert suitable for? The T9205 grade and CVD coating make this CNMG 120408 insert particularly suitable for machining various steels under stable conditions, delivering good wear resistance at elevated cutting speeds.

How is the insert mounted and which holders fit? The insert uses the ISO CNMG form with a cylindrical hole and fits corresponding CNMG external holders and boring bars; compatibility depends on holder form, clearance angle, tolerance class, clamping method, size and thickness.

What surface finish can be expected with a 0.8 mm nose radius? A 0.8 mm nose radius typically yields a fine surface finish for general finishing operations while balancing edge strength for moderate feeds and depths of cut.

Is the insert reversible and how many cutting edges are available? The insert features a double‑sided chipbreaker and is reversible, offering multiple usable cutting edges to improve economy per insert.

Are there specific speed and feed recommendations for this grade? Recommended cutting data depends on steel grade, machine power and rigidity; the T9205 CVD coating supports higher cutting speeds, but starting with conservative feeds and progressively increasing speed is advised to determine the optimal parameters.

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.