CPMT 090308 AH6225 Wendeplatten - Tungaloy

Combining a sharp, stable cutting edge with a robust PVD-coated carbide grade delivers consistent material removal and longer in-process life; the 80° rhombic geometry and 0.8 mm corner radius ensure reliable performance in medium-duty machining of rostfreier Stahl — order directly via Metav Werkzeuge or consult the technical team for holder compatibility.

CPMT 090308 AH6225 Tungaloy indexable insert for Turning — PVD-coated carbide, 80° rhombic

The CPMT090308 AH6225 indexable insert for external and internal turning is engineered for medium-duty operations and is optimised for rostfreier Stahl applications.

• PVD-coated carbide substrate
• Optimised for rostfreier Stahl
• 80° rhombic, 0.8 mm corner radius
• Cylindrical hole with 40°–60° countersink

Stable cutting and consistent edge life for rostfreier Stahl

The insert uses a PVD-treated carbide grade designed to balance edge sharpness with toughness. This combination reduces edge chipping at interrupted cuts and maintains dimensional stability during medium cutting depths. For production environments where material variation and intermittent engagement occur, the specified grade offers a controlled wear pattern, which translates into fewer indexings and predictable tool-change intervals. The described geometry supports steady chip formation, which helps to avoid workpiece surface defects and unexpected scrap.

Compatibility and secure clamping to support process reliability

Compatibility with the toolholder is determined by form, relief angle, tolerance class, fastening method, size and thickness. The rhombic insert is supplied with a cylindrical hole and single-side countersink (40°–60°) to enable standard clamping systems; this ensures repeatable seating and repeatable runout when paired with a suitable outside holder or boring bar. Correct selection of the matching holder and clamping set, including backing pads and screws, is essential for achieving the stated performance and for preserving the insert’s cutting edge integrity.

Geometry that balances strength and finish

An 80° approach angle provides a compromise between robust support and the ability to reach shoulders and external contours. The 0.8 mm corner radius gives increased edge strength compared with smaller radii, while still permitting acceptable surface finish at appropriate feeds. The 11° relief angle reduces rubbing on the flank and helps maintain form accuracy; it is particularly effective when handling the work-hardening tendency of rostfreier Stahl. For operators less familiar with insert geometry: a larger corner radius typically increases tool life but requires slightly higher feed to avoid marks from the edge radius.

AH6225 grade and the single-sided chipbreaker advantage

The AH6225 grade is a PVD-coated hardmetal developed for universal use on rostfreier Stahl, offering a sharp yet stable cutting edge in variable conditions. The single-sided chipbreaker assists in forming short, controlled chips at moderate depths of cut, which simplifies chip evacuation and reduces the risk of built-up edge. In systems where coolant application or chip flow is constrained, a predictable chip shape improves throughput and reduces secondary operations for chip management.

Contact Metav Werkzeuge today for tailored recommendations on Tungaloy turning inserts, holder compatibility and fast supply via Metav Werkzeuge — eMail: info@metav-werkzeuge.com or phone +49 2822 7131930

Technical data

• Article number: 6829383
• SKU: 6829383-Tungaloy
• Manufacturer SKU: TUN6829383
• Model series: ISO turning indexable inserts
• Material: carbide

Core specifications

• Approach angle: 80°
• Corner radius: 0.8 mm
• Relief (clearance) angle: 11°
• Thickness: 3.18 mm
• Size: 09
• Designation: CPMT090308

Special features

• PVD-coated carbide (AH6225)
• Single-sided chipbreaker
• Rhombic plate form
• With hole: cylindrical hole + single-side countersink (40°–60°)
• Application: turning (external and internal)
• Optimised for rostfreier Stahl

FAQ

Can the insert be used for both external and internal turning?
Yes. The CPMT090308 AH6225 indexable insert is specified for external and internal turning; compatibility with a holder is determined by form, clearance angle, fastening and size.

Which materials is this grade intended for?
The AH6225 PVD-coated grade is optimised for rostfreier Stahl and suited to medium-duty machining where a balance of sharpness and edge stability is required.

What does the 80° geometry mean for machining?
An 80° approach angle provides strong edge support while allowing access to shoulders and profiles; it is a common compromise between robustness and reachability in turning operations.

How does the single-sided chipbreaker affect chip control?
The single-sided chipbreaker promotes controlled, shorter chips at moderate depths of cut, improving evacuation and reducing the likelihood of chip entanglement in constrained setups.

Which specifications should be checked to ensure holder compatibility?
Verify the insert form (CPMT), size (09), thickness (3.18 mm), relief angle (11°), hole style and tolerance class 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.