CNMM 120412 T9225 Wendeplatten - Tungaloy

Take advantage of a robust CVD‑coated cemented carbide grade and a secure ISO rhombic form for reliable medium to heavy steel turning; order directly via Metav Werkzeuge or consult our technical advisors for application-specific setup and holder recommendations.

CNMM120412 T9225 turning insert — ISO rhombic indexable insert for turning (Tungaloy)

A CNMM120412 T9225 ISO‑standard rhombic indexable insert designed for external and internal turning, optimised for medium to heavy steel machining and interrupted cuts.

• ISO rhombic geometry, 80° cutting angle
• CVD‑coated cemented carbide grade T9225
• 1.2 mm corner radius for enhanced strength
• Single‑sided chipbreaker for steel turning

Reliable performance for medium to heavy steel machining

The combination of a CVD coating and a cemented carbide substrate delivers a balance of wear resistance and toughness that suits heavy engagement cuts. The T9225 grade is formulated as a robust universal solution for varying cutting conditions, providing extended tool life during roughing and good resistance in slightly interrupted cuts. This results in fewer tool changes and consistent cycle times on production lines.

Secure fit and ISO compatibility reduce setup risk

Manufactured to ISO dimensions, the insert ensures predictable fitting in compatible holders; compatibility depends on form, relief angle, tolerance class, clamping method, size and thickness. The 80° geometry and 0° relief contribute to stable seat load and repeatable positioning in external holders and boring bars, while the cylindrical hole supports positive clamping. Clear specification of these parameters simplifies holder selection and assembly checks.

Improved chip control and edge security for stable turning

A single‑sided chipbreaker combined with a 1.2 mm corner radius promotes controlled chip formation and increased edge strength when machining steel. These features reduce vibration and the risk of edge chipping during heavier cuts, enabling reliable material removal rates with predictable surface finish. The insert’s design supports both productivity and process stability in standard lathe operations.

Practical system advice for efficient use

The insert forms one part of a system comprising the ISO insert, a matching external holder or boring bar, a support shim or clamp set and replacement screws. The presence of a cylindrical hole allows straightforward clamping; however, correct pairing of chipbreaker and grade with the workpiece and cutting strategy is essential. For optimised results, select chipbreaker and cutting parameters matched to the stock material and the intended cutting depth and feed.

For technical advice, application recommendations or to place an order for Tungaloy inserts, contact Metav Werkzeuge — email info@metav-werkzeuge.com or call +49 2822 7131930 to discuss the CNMM120412 T9225 and suitable holder options

Technical Data

• Article number: 6781236
• Manufacturer item number: TUN6781236
• SKU: 6781236-Tungaloy
• Model series: ISO turning inserts

Facts

• Corner radius: 1.2 mm
• Insert size: 12 mm
• Thickness: 4.76 mm
• Relief (clearance) angle: 0°
• Cutting/lead angle: 80°

Special features

• Material: cemented carbide
• Coating/grade: CVD‑coated, T9225
• Chipbreaker: single‑sided
• Hole style: cylindrical hole
• Insert shape: rhombic
• Application: external and internal turning; suitable for medium to heavy steel and interrupted cuts
• System components: ISO insert, matching holder or boring bar, shim/clamp set and screws

FAQ

What materials is this insert best suited for?
The CNMM120412 T9225 insert is optimised for machining medium to heavy steel and performs reliably under slightly interrupted cutting conditions thanks to its CVD coating and robust grade.

How does the chipbreaker affect machining?
The single‑sided chipbreaker on this indexable insert promotes controlled chip formation during steel turning, improving stability and reducing the risk of edge damage under heavy cuts.

Which holders are compatible with this ISO insert?
Compatibility depends on holder form, relief angle, tolerance class, clamping method, size and thickness; the ISO‑standard CNMM120412 fits holders designed for rhombic ISO inserts with the corresponding 12 mm size and 4.76 mm thickness.

Can this insert be used for internal boring?
Yes, the geometry and chip control make the insert suitable for both external and internal turning when mounted in a matching boring bar or internal holder that accepts rhombic ISO inserts.

What is the advantage of the 1.2 mm corner radius?
A 1.2 mm corner radius increases edge strength and resistance to chipping during heavier engagement, supporting higher material removal rates while maintaining process stability.

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.