CNMG 120404 AH905 Wendeplatten - Tungaloy

Take advantage of the PVD-coated AH905 grade and the double-sided chipbreaker to achieve stable, repeatable turning operations; the ISO format and rhombic geometry simplify holder compatibility and inventory. Order the inserts or consult Metav Werkzeuge for application support and matching holders.

CNMG 120404 AH905 CNMG120404 Turning Insert — Tungaloy, PVD-coated carbide, rhombic 80°

CNMG120404 AH905 is an ISO rhombic turning insert for external and internal turning, designed to combine a sharp cutting edge with high process security for general engineering applications

• PVD-coated AH905 grade
• Sharp cutting edge and process security
• Double-sided chipbreaker for controlled chips
• Rhombic form with 80° included angle

Reliable productivity through a wear-resistant grade

The combination of a PVD-coated surface and a carbide substrate delivers consistent tool life and repeatable cutting performance in serial turning tasks. The AH905 grade is engineered for resistance to flank wear and chipping, which helps maintain a sharp cutting edge over longer runs. This stability translates directly into fewer tool changes, less machine downtime and a measurable increase in throughput for routine external and internal turning operations.

Geometry that reduces set-up complexity and improves surface finish

The rhombic plate form with an 80° included angle and a 0° relief angle offers predictable cutting behaviour and easy integration with ISO-compatible holders. A 0.4 mm nose radius balances edge strength and surface finish, while the cylindrical hole and standard thickness make clamping repeatable. These design choices reduce trial-and-error during set-up, resulting in faster process ramp-up and more consistent component quality across batches.

Controlled chips and process security from the chipbreaker design

A double-sided chipbreaker provides reliable chip control for a wide range of turning conditions, keeping swarf manageable and protecting the cutting edge from irregular loads. In combination with the AH905 coating, the chipbreaker contributes to stable cutting forces and reduced risk of edge failure. For production environments where process security is critical, this results in predictable cycle times and a lower scrap rate.

System benefits: ISO compatibility and straightforward spare management

As an ISO-format indexable insert, the plate fits into a standard system comprising a matched external holder or boring bar, support plate and fastening screws. The standardised dimensions and tolerances simplify stocking and replacement, enabling fast changeover and maintaining machine uptime. Where specific holder compatibility is in doubt, the insert’s form, relief angle, tolerance class and thickness serve as clear criteria for selecting the appropriate clamping solution.

For application-specific advice on the AH905 grade and to arrange compatible ISO holders, contact Metav Werkzeuge via info@metav-werkzeuge.com or call +49 2822 7131930 for tailored guidance

Technical data

• Article number: 6859381
• Manufacturer SKU: TUN6859381
• Item SKU: 6859381-Tungaloy
• Model series: ISO turning inserts
• Designation: CNMG120404 AH905 Tungaloy insert

Core measurements

• Insert size: 12 mm
• Plate thickness: 4.76 mm
• Nose radius: 0.4 mm
• Relief angle: 0°
• Included angle: 80°

Design & features

• Material: carbide
• Coating: PVD
• Grade: AH905
• Plate form: rhombic
• Hole: with cylindrical hole
• Chipbreaker: double-sided
• Application: turning (external and internal)
• Compatibility determined by form, relief angle, tolerance class, fastening, size and thickness

FAQ

What types of turning tasks suit this insert best?
The CNMG120404 AH905 Tungaloy insert is designed for general external and internal turning where a sharp cutting edge and stable process behaviour are required; it performs well in routine production and finishing passes.

How does the AH905 PVD coating benefit tool life?
The PVD-coated AH905 grade on this carbide insert improves wear resistance and edge stability, which extends service life and reduces the frequency of index changes for the CNMG120404 AH905 insert.

Can the insert be used in any ISO-compatible holder?
The insert fits ISO-compatible holders when the holder matches the plate’s form, relief angle, tolerance class, fastening method, size and thickness; checking these parameters ensures safe and repeatable clamping.

Is the chip control suitable for long, continuous cuts?
Yes, the double-sided chipbreaker on the CNMG120404 AH905 insert provides controlled swarf formation and consistent cutting forces, supporting continuous and serial machining.

What is the recommended approach if holder compatibility is unclear?
Verify the holder specifications against the insert’s geometry—size 12 mm, thickness 4.76 mm, 0° relief—and select a matching ISO external holder or boring bar to ensure correct seating and clamping.

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.