CPMT 120408 AH905 Wendeplatten - Tungaloy

Benefit from a PVD-coated AH905 grade that delivers wear- and break-resistance together with a precise 0.8 mm corner radius for accurate parting operations; order the insert via Metav Werkzeuge or contact our specialists for tailored advice.

CPMT120408 AH905 turning insert by Tungaloy — PVD-coated carbide, rhombic 12 mm, 80°

CPMT120408 AH905 is an indexable turning insert engineered for grooving, parting and plunge turning within the TungCut system family, combining a sharp cutting edge with robust process security.

• PVD-coated AH905 grade for wear resistance
• Rhombic 12 mm plate with 80° cutting edge
• 0.8 mm corner radius for precise parting
• Cylindrical hole with countersink for secure clamping

Durable cutting edge for uninterrupted production

The CPMT120408 AH905 insert uses a PVD-coated carbide substrate designed to resist flank wear and minimise edge chipping, which translates into longer tool life and fewer production stops. The coating supports a consistently sharp cutting edge that maintains dimensional accuracy during repetitive parting and grooving operations. By choosing a wear-resistant grade, process reliability increases and tool-related downtime falls, improving overall machining throughput.

Precise geometry that enhances dimensional control

The rhombic 12 mm plate form and 80° cutting angle provide a stable cutting interface for narrow groove creation and controlled parting. The 0.8 mm corner radius balances edge strength with the ability to achieve fine features, while the 11° relief angle reduces rubbing and heat generation. These geometric characteristics make the insert especially suitable where repeatable feature size and surface integrity are priorities, allowing machining parameters to be optimised for both quality and cycle time.

System compatibility and secure clamping for predictable results

Designed as part of the TungCut system family, the insert integrates with compatible holders, blades and clamping elements to create a stable assembly for external and internal operations. The cylindrical hole with a one-sided countersink (40°–60°) ensures reliable seating and repeatable positioning in the cutter body. A single-sided chipbreaker assists chip control during parting and plunge cutting, reducing the risk of entanglement and supporting safer, more efficient chip evacuation.

For detailed application recommendations for this Tungaloy TungCut insert or to arrange supply through Metav Werkzeuge, contact Metav Werkzeuge’s technical team for fast, application-focused support.

Technical data

• Manufacturer article number: 6879346
• SKU: 6879346-Tungaloy
• Manufacturer SKU: TUN6879346
• Model series: TungCut
• Designation: CPMT120408

Facts

• Plate size: 12 mm
• Plate thickness: 4.76 mm
• Corner radius: 0.8 mm
• Relief angle: 11°
• Cutting angle: 80°
• Hole style: cylindrical hole + one-sided countersink (40°–60°)

Special features

• Material: carbide
• Coating: AH905 (PVD)
• Plate form: rhombic
• Chipbreaker: single-sided
• Application: turning — grooving, parting, plunge turning
• System construction: holders/blades/clamping elements

FAQ

What operations is this insert designed for?
The CPMT120408 AH905 insert is intended for grooving, parting and plunge turning within the TungCut system family and is engineered to provide a sharp edge and process security in these applications.

Which clamping and hole style does the insert use?
The insert features a cylindrical hole with a one-sided countersink (40°–60°) for secure seating and repeatable positioning in compatible TungCut cutter bodies.

How does the coating and grade support production?
The AH905 PVD coating on the carbide substrate reduces wear and edge chipping, enhancing tool life and supporting consistent machining performance across repetitive parting cycles.

Is chip control supported during parting and plunge cutting?
Yes, the single-sided chipbreaker is designed to improve chip formation and evacuation, reducing the likelihood of chip entanglement during narrow-groove and parting operations.

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.