CCMT 120412 AH725 Wendeplatten - Tungaloy

The combination of a PVD-coated carbide grade and an ISO-compliant geometry delivers reliable performance and consistent chip control in mixed-material turning operations; benefit from enhanced process security and long tool life. Order the insert directly via Metav Werkzeuge or consult our technical advisers for application support.

CCMT120412 AH725 Tungaloy indexable insert — PVD-coated carbide, universal turning

The CCMT120412 AH725 is an ISO-standard rhombic turning insert for external and internal turning, engineered for universal use on steel and stainless steels with a focus on process security and stable chip formation.

• ISO rhombic insert CCMT120412
• PVD-coated carbide AH725 for steels
• 1.2 mm corner radius for stable cuts
• Cylindrical hole with single-sided countersink

Greater process security for changing workpiece materials

The PVD-coated AH725 grade provides a balanced combination of toughness and wear resistance, making it suitable for machining both steel and stainless steels in environments where material batches or workpiece mixes vary. By choosing a universal PVD-coated carbide grade, the risk of unexpected insert breakouts is reduced and tool change frequency can be minimised, which supports steady production cycles. This reliability translates directly into predictable cycle times and fewer interruptions on lathes or turning centres.

Geometry that supports consistent chip control and tool life

The rhombic insert form with an 80° principal angle and a 1.2 mm corner radius yields a robust cutting edge that withstands intermittent cuts and moderate interruptions. The specified 7° clearance reduces rubbing and heat buildup at the flank, while the single-sided chipbreaker promotes controlled chip formation and evacuation in turning operations. These geometric choices reduce edge loading and contribute to a more even wear pattern, which helps maintain surface quality and extend the effective life of the insert.

ISO compatibility for simple set-up and flexible tooling

Manufactured to ISO dimensions, the insert matches holders that correspond in form, clearance angle, tolerance class, fastening type, size and thickness, enabling quick retrofits and consistent clamping behaviour. The cylindrical hole with a single-sided countersink (40°–60°) ensures secure fastening and repeatable positioning. With a plate thickness of 4.76 mm and a standard CCMT shape, this insert integrates into common tool assemblies, simplifying inventory management and reducing the need for bespoke tooling solutions.

Operational benefits and application guidance

The insert is optimised for conventional turning tasks and is particularly valuable where a compromise between toughness and wear resistance is required. The combination of the PVD coating and the substrate material supports good edge stability on smaller tools and in applications demanding consistent results. For best outcomes, select a matching chipbreaker and grade variation aligned with the workpiece, machining strategy and machine rigidity to fully exploit the insert’s strengths.

Contact Metav Werkzeuge today to discuss how the Tungaloy CCMT120412 AH725 insert can stabilise production processes — our specialists are available at info@metav-werkzeuge.com or by phone on +49 2822 7131930 to advise on holder compatibility and optimal grade selection

Technical data

• Article number: 6865484
• Manufacturer SKU: TUN6865484
• Label: CCMT120412 AH725 Tungaloy-Wendeplatte
• Model series: ISO-Drehwendeschneidplatten
• SKU: 6865484-Tungaloy

Facts

• Corner radius: 1.2 mm
• Insert size: 12 mm
• Plate thickness: 4.76 mm
• Clearance angle: 7°
• Principal angle: 80°

Special features

• Material: cemented carbide
• Coating / grade: PVD-coated AH725
• Plate form: rhombic (CCMT)
• Hole style: cylindrical hole + single-sided countersink (40°–60°)
• Chipbreaker: one-sided
• Typical application: turning (external and internal)
• Compatibility: ISO-standard insert, fits matching ISO holders

FAQ

Is this insert suitable for both external and internal turning?
Yes. The CCMT120412 AH725 indexable insert is designed for both external and internal turning applications and performs well when combined with an appropriate holder and chipbreaker for the task.

Which materials is the AH725 grade recommended for?
The AH725 grade is a universal PVD-coated carbide selected for reliable performance on steel and stainless steels, especially where material mixes and process security are priorities.

How does the 1.2 mm corner radius affect cutting performance?
A 1.2 mm corner radius reinforces the cutting edge, improving resistance to edge chipping and permitting slightly higher depths of cut while delivering stable surface finishes in interrupted or continuous turning.

What must be checked to ensure holder compatibility?
Compatibility is determined by the insert form (CCMT), clearance angle, tolerance class, fastening type, insert size and thickness; verify these dimensions against the holder specifications before mounting.

Does the insert require a special clamp or screw?
The CCMT120412 features a cylindrical hole with a single-sided countersink; use the matching clamping set and screws designed for ISO-standard CCMT inserts to ensure correct seating and repeatability.

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.