CNMG 120404 GT720 Wendeplatten - Tungaloy

Combine reliable finishing performance with consistent wear resistance and ISO compatibility for predictable turning results; order the insert via Metav Werkzeuge or consult our technical team for application-specific recommendations.

CNMG 120404 GT720 – Turning indexable insert by Tungaloy, cermet

A CNMG120404 GT720 indexable insert for ISO‑standard turning, optimised for finishing to light machining of steel and compatible with standard rhombic holders

• ISO CNMG geometry for broad holder compatibility
• GT720 cermet grade for superior surface finish
• Rhombic 80° form with 0.4 mm corner radius
• Double-sided chipbreaker, cylindrical hole for secure clamping

Precision finishing where surface quality matters

The GT720 grade is a cermet option developed for finishing to light machining of steel, delivering a marked improvement in surface finish and dimensional accuracy compared with conventional carbide grades. Thanks to the fine ceramic phase and wear-resistant substrate, the insert provides more uniform flank wear over serial production, which reduces the need for frequent regrinding or inspection. This benefit supports predictable component tolerances and contributes directly to a smoother production flow.

Compatibility and secure clamping for predictable results

Built to the ISO CNMG120404 geometry, the insert’s 80° rhombic form and cylindrical hole ensure compatibility with a wide range of ISO CNMG holders; compatibility is determined by holder form, relief angle, tolerance class, clamping method, size and thickness. The 0.4 mm corner radius and 4.76 mm thickness give a stable seating in the pocket while the central hole allows secure clamping with the appropriate shim and screw. Match the insert to a suitable external holder and ensure the correct shim set for consistent positioning and repeatable turning operations.

Controlled chip flow and reliable edge life

The double-sided chipbreaker is configured for finishing-to-light cutting conditions and promotes reliable chip formation when machining common steels. With the insert mounted on a cemented carbide substrate, the combination of geometry and material supports steady cutting-edge behaviour and extended intervals between indexings. The resulting advantages are improved surface quality and straightforward process control, especially when tight tolerances and consistent finish are required.

For GT720 finishing applications, contact Metav Werkzeuge for availability and tailored advice at info@metav-werkzeuge.com or call +49 2822 7131930

Technical Data

• Article number: 6849427
• SKU: 6849427-Tungaloy
• Manufacturer SKU: TUN6849427

Data

• Size: 12 mm
• Thickness: 4.76 mm
• Corner radius: 0.4 mm
• Relief angle: 0°
• Included angle: 80°

Special features

• Grade: GT720 (cermet or coated cermet)
• Material: cemented carbide substrate
• Shape: rhombic
• Chipbreaker: double-sided
• Hole: with hole (cylindrical)
• Application: Turning
• System components: compatible external holder, shim/clamping set, replacement screws

FAQ

What materials is this insert suitable for?
This insert is intended primarily for finishing and light machining of steel; the GT720 cermet grade emphasises surface quality and consistent wear when used on typical steel grades.

Which holders fit this insert?
The ISO CNMG geometry of the CNMG120404 GT720 insert (SKU 6849427-Tungaloy) is compatible with standard CNMG external holders; compatibility depends on form, relief angle, tolerance class, clamping method, size and thickness.

What advantages does the GT720 cermet offer?
The GT720 cermet provides improved surface finish and dimensional stability over runs, promoting uniform wear and reduced frequency of regrinding compared with some conventional grades.

Is the insert indexable on both sides?
Yes; the double-sided chipbreaker means the insert can be indexed to present a fresh cutting edge, doubling the number of usable edges before disposal.

How is the insert clamped in the toolholder?
The insert features a cylindrical hole for secure clamping; standard practice uses a matching shim/clamp set and replacement screw to ensure correct seating and repeatable positioning.

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.