CNMA 120412 T5105 Wendeplatten - Tungaloy

Combining high wear resistance with stable cutting-edge performance, this insert delivers consistent productivity in cast-iron turning; ideal for high-speed operations under stable conditions. Order the item directly via Metav Werkzeuge or consult our specialists for application advice.

CNMA120412 T5105 ISO indexable turning insert for turning by Tungaloy

The CNMA120412 T5105 is an ISO indexable turning insert designed for high-speed external and internal turning, optimised for cast-iron machining under stable machining conditions.

• CVD-coated carbide for extended tool life
• Designed for high-speed cast-iron turning
• ISO CNMA 120412 form, 80° rhombic geometry
• 1.2 mm corner radius for reliable edge strength

Reliable performance for high-speed turning

The combination of a CVD-coated surface and a carbide substrate provides enhanced wear resistance and thermal stability during sustained cutting. This grade is developed for high-speed machining of cast iron, where continuous contact and elevated temperatures challenge the cutting edge. The CVD-layer reduces abrasive wear and preserves the edge geometry for longer tool life, which in turn minimises unplanned tool changes and supports a predictable machining cycle. Understanding these material properties helps when planning feeds and speeds for improved throughput.

Precise geometry for consistent part quality

An 80° rhombic geometry with a 1.2 mm corner radius combines strength at the cutting edge with the capacity to produce stable surface finishes on interrupted and continuous cuts. The ISO form CNMA120412 ensures compatibility with a wide range of clamping systems; fit is determined by the insert form, relief angle, tolerance class, fastening style, size and thickness. The insert’s 0° relief angle and rhombic form facilitate both external and internal turning operations, while the central cylindrical hole supports secure seat retention in standard indexable holders, aiding repeatable positioning and dimensional reliability.

Process stability and practical selection guidance

The T5105 grade is a wear-resistant option intended for stable set-ups and continuous cuts in cast iron. When selecting tooling components, match the insert to a holder that maintains rigidity and correct seating to exploit the grade’s longevity. Where chip control is critical, pair the insert with an appropriate chipformer and adjust cutting parameters to the casting grade and machine dynamics. For custom applications or marginal set-ups, the technical team at Metav Werkzeuge can advise on holder choice, clamping sets and replacement parts to maintain process stability and reduce cycle variation.

Contact Metav Werkzeuge for specification support on the Tungaloy CNMA120412 T5105 insert — our specialists provide application advice and can confirm compatibility with existing holders and machining strategies.

Technical data

• Article number: 6850145
• Manufacturer SKU: TUN6850145
• Manufacturer: Tungaloy

Facts

• Insert designation: CNMA120412
• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 1.2 mm
• Relief angle: 0°
• Insert angle: 80°

Special features

• Material: carbide
• Coating: CVD
• Grade: T5105, wear-resistant for high-speed cast-iron machining
• ISO indexable turning insert series
• Rhombic plate form with cylindrical hole
• No chipbreaker fitted
• Application: turning (external and internal)

FAQ

What materials is this insert best suited for?
The CNMA120412 T5105 insert is optimised for machining cast iron; T5105 is a wear‑resistant grade developed for high‑speed cast‑iron turning.

How does the CVD coating improve performance?
A CVD coating on the carbide substrate increases thermal and abrasive resistance, which helps maintain the cutting edge during prolonged high‑speed operations.

Which insert geometry does CNMA120412 offer and why does it matter?
The insert features an 80° rhombic geometry with a 1.2 mm corner radius, balancing edge strength and surface finish for both external and internal turning tasks.

Is this insert compatible with standard ISO holders?
Compatibility is determined by the insert form, relief angle, tolerance class, fastening, size and thickness; the CNMA120412 follows ISO convention for easy matching with appropriate holders.

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.