CNMG 120412 T9205 Wendeplatten - Tungaloy

Reliable productivity and extended tool life result from the wear‑resistant T9205 CVD coating combined with the stabilising 1.2 mm corner radius; benefit from consistent turning performance and streamlined tool changes — order the CNMG120412 T9205 Tungaloy insert directly via Metav Werkzeuge or consult our technical advisors for application matching.

CNMG120412 T9205 indexable turning insert — CVD‑coated carbide for turning (Tungaloy)

CNMG120412 T9205 is an ISO‑standard rhombic indexable insert designed for productive external and internal turning operations, optimised for steel machining under stable conditions.

• CVD-coated carbide grade T9205
• 80° rhombic geometry for versatile turning
• 1.2 mm corner radius for edge strength
• Double-sided chipbreaker, with cylindrical hole

High productivity through wear‑resistant grade and coating

The insert uses a CVD‑coated carbide substrate in grade T9205, selected for wear resistance during high‑speed turning of steel. The coating provides a hard, thermally stable surface that reduces flank wear and allows higher cutting speeds where machine and setup stability permit. For process planners this means fewer tool changes and greater net cutting time per shift; for operators the result is repeatable cut quality and longer‑lasting cutting edges. The specification targets productive turning in stable conditions rather than intermittent roughing cycles.

Geometry that supports stable cutting and surface quality

An 80° rhombic geometry combined with a 1.2 mm corner radius delivers a balance between edge strength and cutting clearance. The moderate radius helps absorb cutting forces and improves edge durability during interrupted cuts, while the rhombic shape permits multiple indexing positions. The insert’s 0° relief angle and standard seat fit ensure predictable engagement with common ISO turning holders, reducing the need for experimental offsets and improving first‑pass accuracy on workpieces.

System compatibility and secure clamping for reliable exchange

The item conforms to ISO indexing for turning inserts and is supplied with a cylindrical hole for secure clamping. The combination of form, free angle, tolerance class, fastening method, size and thickness determines holder compatibility; matching the insert to the correct external holder or boring bar, with appropriate shim or clamp set and replacement screw, ensures repeatable seating and torque transfer. Where fixture rigidity and tool overhang are optimised, the double‑sided chipbreaker helps maintain consistent chip formation and evacuation, supporting longer uninterrupted cycles.

Practical selection guidance and application focus

This grade and geometry are intended primarily for steel machining where a productive finish or semi‑finishing pass is required at elevated cutting speeds. The T9205 grade is appropriate where stable setups and machine power permit higher cutting parameters; for lighter, more variable setups or non‑ferrous materials, alternative chipbreaker styles or grades should be considered. The insert’s rhombic form and double‑sided design support cost‑efficient rotation and reuse of multiple cutting edges, which benefits batch production and serial turning tasks.

For tailored advice on integrating the Tungaloy CNMG120412 T9205 insert into a production process, contact Metav Werkzeuge via info@metav-werkzeuge.com or call +49 2822 7131930 to discuss holder compatibility and order options

Technical data

• Article number: 6785653
• Manufacturer article number: 6785653
• Manufacturer SKU: TUN6785653
• SKU: 6785653-Tungaloy
• Model series: ISO‑Drehwendeschneidplatten
• Designation: CNMG120412

Core data

• Cutting edge angle: 80°
• Plate size: 12 mm
• Plate thickness: 4.76 mm
• Corner radius: 1.2 mm
• Relief angle: 0°
• Hole style: cylindrical hole

Features

• Material: carbide
• Coating: CVD
• Grade: T9205
• Plate shape: rhombic (CNMG)
• Chipbreaker: double‑sided
• Application: turning (external and internal)
• ISO‑standard indexable insert

FAQ

What materials is this insert intended for?
The Tungaloy CNMG120412 T9205 insert is formulated for productive turning of steel, where the CVD‑coated T9205 grade delivers wear resistance at higher cutting speeds.

Is the CNMG120412 compatible with standard ISO turning holders?
Yes. The insert follows ISO indexing conventions; compatibility depends on holder form, free angle, tolerance and clamping method—verify holder seat matches the CNMG form.

How does the 1.2 mm corner radius influence cutting performance?
A 1.2 mm corner radius increases edge strength and helps stabilise the cut, improving resistance to chipping and supporting longer tool life in semi‑finishing and finishing passes.

Can the double‑sided chipbreaker be used for heavy roughing?
The double‑sided chipbreaker on this insert is optimised for controlled chip formation under stable conditions; for very heavy roughing, a dedicated roughing grade or chipbreaker may be preferable.

How many cutting edges are available per insert index?
The rhombic CNMG geometry provides multiple usable edges per indexable plate; the exact count follows the CNMG‑type indexing standard and supports rotational reuse to reduce tooling costs.

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.