DCMT 11T308 AH905 Wendeplatten - Tungaloy

Take advantage of the PVD-coated AH905 grade, the 55° rhombic geometry and the 0.8 mm nose radius to secure stable, process-safe turning with long tool life; order the DCMT11T308 AH905 turning insert directly via Metav Werkzeuge or contact our consultants for application-specific advice.

DCMT11T308 AH905 turning insert by Tungaloy — PVD-coated carbide, 55° rhombic geometry

The DCMT11T308 AH905 is a PVD-coated carbide indexable turning insert designed for external and internal turning in ISO-standard tool systems.

• PVD-coated carbide AH905 for wear resistance
• Rhombic 55° geometry for versatile turning
• 0.8 mm nose radius for precise edge control
• Cylindrical hole with 40°–60° countersink

Longer runtime and stable production through advanced coating

The combination of a PVD-coated surface and a wear-resistant carbide substrate delivers a clear benefit in daily machining: reduced flank wear and improved resistance to chipping under interrupted cuts. The AH905 grade was developed for applications where a sharp cutting edge and high process security are required; this reduces the frequency of tool changes and helps maintain consistent cycle times. For operations that prioritise uptime and repeatable part quality, the coating and substrate pairing contributes to measurable productivity gains and lower running costs over a production run.

Geometry engineered for accuracy and surface quality

The 55° rhombic geometry together with a 0.8 mm nose radius and a 7° clearance angle balances edge strength with surface finish. A larger nose radius increases the contact area and typically improves surface smoothness, whereas a smaller radius sharpens the cutting edge for finishing passes; the selected radius provides a compromise that supports dimensional accuracy without sacrificing edge stability. The angled geometry reduces cutting forces in many turning setups, enabling stable behaviour in both external and internal turning applications and promoting consistent chip formation when paired with the appropriate one-sided chipbreaker.

ISO compatibility and practical handling for fast tool changes

These inserts conform to ISO standards for indexable turning plates, which simplifies selection of holders and reduces procurement complexity. Compatibility depends on the insert form, clearance, tolerance class, fixing method, size and thickness; the cylindrical hole with single-sided countersink (40°–60°) gives secure clamping and repeatable location in many external holder designs. The 3.97 mm plate thickness and size 11 make the insert suitable for a broad range of steel and alloy turning tasks. When selecting a holder, match the plate’s geometry and clamping style to ensure correct seat contact and torque distribution for process reliability.

Practical advantages and application notes

The insert’s one-sided chipbreaker is tailored for common turning strategies and promotes effective chip control when cutting parameters and workpiece material are aligned with the AH905 grade. For finishing and semi-finishing operations on medium to high-strength steels and common alloys, this combination of PVD coating, carbide substrate and optimised geometry reduces built-up edge and helps achieve consistent surface finishes. When uncertain about which chipbreaker or grade suits a specific alloy or stability condition, choosing the AH905 grade provides a robust baseline for many general turning tasks.

For tailored advice on machining strategies with Tungaloy AH905 inserts and fast supply from Metav Werkzeuge, contact Metav Werkzeuge by email at info@metav-werkzeuge.com or by phone at +49 2822 7131930 — our specialists will recommend the optimal holder and parameters for the application.

Technical Data

• Article number: 6816931
• SKU: 6816931-Tungaloy
• Manufacturer SKU: TUN6816931
• Model series: ISO turning indexable inserts
• Designation: DCMT11T308 AH905

Facts

• Insert size: 11
• Plate thickness: 3.97 mm
• Nose radius: 0.8 mm
• Approach angle: 55°
• Clearance angle: 7°
• Hole: with hole
• Hole style: cylindrical hole + single-sided countersink (40°–60°)

Special features

• Coating: AH905 (PVD)
• Material: carbide
• Plate form: rhombic
• Chipbreaker: one-sided
• Typical application: external and internal turning
• ISO-standardised insert

FAQ

What materials is this insert suitable for?
The DCMT11T308 AH905 insert is optimised for a broad range of steels and common alloys; the AH905 PVD-coated carbide grade offers wear resistance and edge stability for typical turning tasks.

How does the 0.8 mm nose radius affect surface finish?
A 0.8 mm nose radius gives a balance between edge strength and finish; the radius supports consistent surface quality while maintaining enough edge robustness for semi-finishing and finishing passes with the specified geometry.

Is the insert compatible with standard ISO holders?
Yes, the insert follows ISO indexable insert conventions; compatibility is determined by insert form, clearance, tolerance, fixing method, size and thickness, so select a holder matching the DCMT form and 55° geometry.

What advantage does the cylindrical hole with countersink provide?
The cylindrical hole with a 40°–60° single-sided countersink improves location repeatability and clamping stability, reducing the risk of insert movement and promoting consistent cutting conditions.

Can the AH905 coating withstand interrupted cuts and tougher conditions?
AH905’s PVD coating and carbide substrate are designed to resist wear and edge chipping, offering improved process security under many interrupted cutting scenarios when used with the correct parameters and a suitable holder.

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.