CNMG 120404 NS520 Wendeplatten - Tungaloy

Combine high process reliability and excellent surface finish with straightforward holder compatibility to keep turning operations productive; the cermet grade and precise geometry support consistent, low-variation results. Order the CNMG120404 NS520 Tungaloy insert via Metav Werkzeuge or consult our specialists for application advice.

CNMG 120404 NS520 Tungaloy turning insert — cermet, 0.4 mm corner radius

CNMG120404 NS520 Tungaloy is an ISO rhombic turning insert designed for finishing to light turning of steel, optimised for surface quality and dimensional accuracy

• Cermet grade NS520 for fine surface finishes
• ISO CNMG 120404 rhombic insert form
• 0.4 mm corner radius for accurate edges
• 4.76 mm plate thickness with cylindrical hole

Superior finish and dimensional control for finishing operations

The cermet cutting material NS520 is developed for finishing to light turning of steel, delivering a consistently high surface quality and stable wear behaviour. Cermet grades combine a hard matrix with ceramic components to reduce built-up edge and support tight tolerances; this results in fewer rework steps and improved part throughput. When a fine surface and accurate dimensions matter, the insert’s geometry reduces the need for additional polishing, supporting a more efficient production sequence.

Robust ISO system compatibility for reliable clamping

Specified as ISO CNMG 120404, the insert conforms to standard holder geometries so compatibility depends on form, relief angle, tolerance class, attachment, size and thickness. The cylindrical hole accommodates secure clamping in seat-and-screw systems, improving repeatability during index changes. Using standardised inserts simplifies tool inventory and reduces changeover time, which translates into less machine downtime and a more predictable process.

Stable cutting behaviour under controlled conditions

With a rake angle 0° and a double-sided chipbreaker, the geometry is tuned for even chip formation and consistent cutting forces during finishing passes. The 0.4 mm corner radius helps maintain edge strength while limiting cutting forces, which benefits surface integrity and reduces micro-chatter. Note that cermet grades excel in continuous cuts and light passes; the combination of material and chip control promotes longer intervals between tool changes in precision turning tasks.

Practical handling and recommended application

Manufactured from cemented carbide and finished to a 4.76 mm plate thickness, the insert is supplied in the rhombic shape with standard ISO dimensions and a secure hole style. The design suits external and internal turning where the priority is surface quality and uniform wear rather than heavy roughing. Inspect the seating surfaces and screw torque at each index to retain consistent clamping; correct mounting preserves dimensional accuracy and extends the insert’s service life.

For technical advice or to request delivery of the Tungaloy CNMG120404 NS520 cermet insert, contact Metav Werkzeuge for application support and rapid dispatch: info@metav-werkzeuge.com or +49 2822 7131930

Technical Data

• Article number: 6802027
• SKU: 6802027-Tungaloy
• Manufacturer SKU: TUN6802027
• Model series: ISO-Drehwendeschneidplatten
• Material: cemented carbide
• Grade/coating: NS520
• Manufacturer: Tungaloy

Facts

• Corner radius: 0.4 mm
• Plate size: 12 mm
• Plate thickness: 4.76 mm
• Included angle: 80°
• Rake/freedom angle: 0°
• Hole: with hole, cylindrical hole

Special features

• Rhombic plate form (CNMG)
• Double-sided chipbreaker
• Schneidstofftyp: cermet / coated cermet
• Application: finishing to light turning of steel
• System build-up: ISO insert, matching outer holder or boring bar, clamp set and replacement screws

FAQ

What materials is this insert best suited for?
The CNMG120404 NS520 Tungaloy insert is optimised for turning steel; the NS520 cermet grade emphasises surface finish and dimensional stability in finishing to light turning operations.

Can the insert be used for roughing operations?
This insert is designed for finishing to light turning; while it provides excellent surface integrity, heavy roughing is not recommended due to the cermet’s lower toughness compared with conventional carbide grades.

How is the insert clamped in the holder?
The rhombic ISO CNMG 120404 form with a cylindrical hole is clamped using standard seat-and-screw systems; correct torque and a clean seating surface ensure repeatable positioning and process stability.

What advantage does the 0.4 mm corner radius provide?
A 0.4 mm corner radius balances edge strength with low cutting forces, improving surface finish and reducing the risk of edge chipping during precision passes with the Tungaloy insert.

Is the chipbreaker suitable for internal and external turning?
Yes, the double-sided chipbreaker supports controlled chip formation in both external and internal finishing applications when cutting parameters and stability are appropriate.

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.