CNMG 120412 T9225 Wendeplatten - Tungaloy

Robust CVD-coated carbide and a 1.2 mm corner radius deliver stable cutting under varying engagement; the rhombic CNMG geometry with an 80° lead angle supports reliable external and internal turning. Order or request advice via Metav Werkzeuge for compatible holders and clamping sets.

CNMG 120412 T9225 — CNMG ISO turning insert for turning, CVD-coated carbide by Tungaloy

The CNMG 120412 T9225 is an ISO-format rhombic indexable insert designed for medium-to-heavy steel turning, offering a robust CVD-coated carbide grade and a double-sided chipbreaker for versatile workshop use.

• CVD-coated carbide grade T9225
• Suited for medium to heavy steel turning
• 80° lead angle for stable cutting
• Double-sided chipbreaker with cylindrical hole

Precision and durability for robust turning operations

The combination of a CVD-coated surface and the T9225 carbide grade provides a balance of wear resistance and toughness that is appropriate for mixed and interrupted cuts in steel. This indexable insert is engineered to maintain edge integrity under variable conditions, reducing unexpected tool changes and supporting consistent cycle times. The coating improves resistance to abrasive wear and built-up edge, while the substrate supplies the core toughness needed for heavier engagement depths, translating into fewer interruptions and steadier productivity.

Geometry that supports stable machining and surface quality

The rhombic CNMG shape, paired with an 80° lead angle and a compact 1.2 mm corner radius, reduces radial load peaks and increases insert rigidity during external turning. The insert’s 0° relief angle and a 4.76 mm thickness contribute to a solid seating in the pocket, while the 12 mm inscribed circle dimension governs reaching and overhang characteristics for different holders. These geometric choices help to maintain surface finish and repeatability, and they enable predictable toolpath planning for both roughing and finishing passes.

Compatibility, handling and application guidance

This insert conforms to ISO standards for turning inserts and is compatible with ISO holders when the form, relief angle, tolerance class, fastening method, size and thickness are matched. A typical system comprises the ISO insert, a suitable external holder or boring bar, a clamping pad/kit and replacement screws. The double-sided design with a cylindrical hole allows indexation for efficient tool life use; the chipbreaker should be selected according to material, cut type and machine stability. If unsure about holder matching or parameter setup, the technical team can provide guidance.

Production benefits and inventory simplification

Selecting a universal, robust grade such as T9225 reduces the need for multiple specialised grades, simplifying inventory and offering economic advantages over time. The insert’s construction supports process stability and can extend periods between tool interventions. For operations requiring flexible response to interrupted cuts or mixed batch work, this solution minimises downtime and helps to keep production schedules reliable. For technical queries or to verify suitability for a particular application, Metav Werkzeuge provides specification support and machining recommendations.

Contact Metav Werkzeuge for tailored guidance on Tungaloy turning inserts and to confirm holder compatibility with the CNMG 120412 T9225; technical data and ordering support are available via Metav Werkzeuge.

Technical data

• Article number: 6781266
• Manufacturer SKU: TUN6781266
• Model series: ISO turning inserts
• Designation: CNMG120412
• Manufacturer item no: 6781266

Facts

• Insert size (inscribed circle): 12 mm
• Thickness: 4.76 mm
• Corner radius: 1.2 mm
• Lead angle: 80°
• Relief angle: 0°
• Hole style: cylindrical hole

Special features

• Material: cemented carbide
• Grade/coating: T9225 (CVD-coated)
• Chipbreaker: double-sided
• Plate shape: rhombic
• Application: turning
• System components: insert, holder, clamping pad/kits, replacement screws

FAQ

What workpiece materials is this insert intended for?
The CNMG 120412 T9225 insert is designed primarily for medium-to-heavy steel machining and performs well under mixed engagement and slightly interrupted cuts.

Is this insert suitable for interrupted cutting conditions?
Yes; the T9225 grade’s toughness and the robust carbide substrate make the insert appropriate for interrupted cuts and variable engagement.

How is the insert secured in the holder?
The insert uses a cylindrical hole for clamping and is compatible with ISO-standard holders when size, thickness and relief match the pocket; the system typically includes a clamping pad and screws.

What are the key geometric values to consider when selecting a holder?
Consider the 12 mm inscribed circle, 4.76 mm thickness, 1.2 mm corner radius and 80° lead angle to ensure correct seating and cutting geometry.

Which chipbreaker and grade selection is recommended for different tasks?
The double-sided chipbreaker suits general turning; for finer finishing or specific materials, choose the chipbreaker and cutting parameters according to stability, material and required surface quality—Tungaloy’s T9225 is a strong universal choice for steel.

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.