CNMG 120408 T5105 Wendeplatten - Tungaloy

Take advantage of the combination of high‑speed performance, robust CVD-coated carbide grade T5105, and reliable chip control for efficient turning of cast iron; order directly via Metav Werkzeuge or consult the advisors for tailored recommendations.

CNMG120408 T5105 — Turning indexable insert (ISO CNMG geometry) by Tungaloy

The CNMG120408 T5105 is an ISO-standard turning insert for external and internal turning, designed for high‑speed machining of cast iron under stable conditions and compatible with common CNMG holders.

• ISO‑standard CNMG geometry for broad holder fit
• CVD‑coated T5105 grade for high‑speed cast‑iron
• Double‑sided chipbreaker for consistent chip control
• Cylindrical hole for secure, repeatable clamping

Efficient high‑speed turning with a wear‑resistant grade

The CVD‑coated T5105 carbide composition delivers a focused balance of wear resistance and toughness for demanding turning operations on cast iron. With a CVD coating that reduces abrasive wear, the insert maintains cutting-edge performance at elevated cutting speeds; this translates into longer tool life and fewer index changes, supporting uninterrupted production cycles. The combined effect of the substrate and coating ensures predictable tool behaviour, making it suitable for applications where consistent material removal rates and surface finishes are required.

Predictable chip control and secure clamping for stable cuts

Equipped with a double‑sided chipbreaker, the insert promotes controlled chip formation and evacuation during both light and medium‑depth cuts, reducing the risk of built‑up edge and improving surface integrity. The cylindrical hole and standard CNMG form provide secure clamping in compatible external holders or boring bars, aiding repeatable positioning and concentricity. With a 0° relief angle and an 80° included angle, the geometry supports versatile approach angles while maintaining stability on long overhangs when a suitable holder and clamping torque are used.

Clear dimensional and geometric advantages for process planning

The rhombic insert form and the corner radius 0.8 mm combine to deliver a compromise between strength and finishing capability: the radius aids stronger cutting edge life, while remaining small enough for fine finishing passes. The 4.76 mm thickness and nominal 12 mm size match widely used CNMG holders, simplifying integration into existing toolsets. These dimensional standards help planners calculate cutting parameters, fixture clearances and tool‑change logistics with fewer unknowns, supporting predictable cycle times.

Practical recommendations for integration and productivity gains

For best results in cast‑iron turning, pair the insert with a rigid clamping system and a holder that matches CNMG tolerance classes; select feed and speed settings that leverage the T5105 grade’s wear resistance without overloading the edge. When process stability is achieved, the grade's durability reduces downtime for index changes and supports higher productivity. The insert’s ISO compliance facilitates spare‑parts management and rapid replacement, contributing to leaner inventory and simpler tool audits.

For application advice and to procure CNMG120408 T5105 turning inserts from Tungaloy, contact Metav Werkzeuge — email info@metav-werkzeuge.com or call +49 2822 7131930 for specification support and ordering guidance.

Technical data

• Article number: 6850131
• Manufacturer SKU: TUN6850131
• Model series: ISO turning indexable inserts
• Designation: CNMG120408

Facts

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

Special features

• Material: carbide
• Coating/grade: CVD‑coated T5105
• Chipbreaker: double‑sided
• Shape: rhombic
• Hole: with cylindrical hole
• Typical application: external and internal turning; high‑speed cast‑iron machining

FAQ

Which materials is this insert best suited for? The CNMG120408 T5105 insert is optimised for cast‑iron machining; the T5105 CVD coating provides abrasion resistance for high‑speed turning of cast iron.

How does the T5105 grade affect machining performance? T5105 delivers increased wear resistance and stable edge life at elevated cutting speeds, helping the insert maintain consistent performance during longer production runs.

What does the double‑sided chipbreaker mean in practice? A double‑sided chipbreaker provides controlled chip formation on both index positions of the insert, improving evacuation and reducing the risk of tangling in interrupted or continuous cuts.

How can compatibility with existing holders be ensured? Compatibility depends on CNMG geometry, relief angle, tolerance class, hole style and plate thickness; matching these parameters to the holder ensures secure clamping and correct seating.

Is this insert suitable for finishing passes? Yes; with a 0.8 mm corner radius the insert balances edge strength and the ability to achieve fine surface finishes when appropriate feeds and speeds are used.

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.