CNMG 120404 T9215 Wendeplatten - Tungaloy

Benefit from a balanced combination of CVD coating and a TM chipbreaker that delivers durable flank‑wear resistance and stable edge security for economical series turning of steel; the 0.4 mm corner radius reduces radial forces for finer profile control. Order through Metav Werkzeuge or request personalised cutting data from their technical advisers.

CNMG 120404 T9215 CNMG insert for medium turning by Tungaloy — CVD‑coated carbide, 0° clearance

The CNMG120404‑T9215 is a negative, CVD‑coated carbide indexable insert engineered for productive medium turning of carbon and alloy steels in serial production.

• CVD coating with Al₂O₃ + TiN for heat protection
• TM chipbreaker optimised for medium machining
• 0.4 mm corner radius for lower radial forces
• Rhombic 80° geometry with 4 usable edges

High productivity and stable turning for steel components

The negative CNMG geometry, paired with the TM chipbreaker, provides a reliable balance between wear resistance and edge security for continuous and lightly interrupted cuts. The insert’s CVD coating (Ti‑compound + Al₂O₃ + TiN) and a substrate hardened to industrial standards translate into extended flank life under stable machining conditions. For companies aiming to reduce tool changes in serial turning, this geometry supports higher cutting speeds in the ISO P10–P20 range while maintaining surface quality. Practical benefits include fewer stoppages and predictable tool‑life windows when machine rigidity, coolant and process parameters are controlled.

Coating and substrate—what the technical data means on the shop floor

A thick Al₂O₃ layer (approx. 18 µm) increases thermal and crater wear protection, allowing for elevated cutting speeds on steels compared with uncoated grades. The T9215 composition positions itself between very wear‑resistant and very tough grades: it resists flank wear better than tougher roughing grades, yet offers more fracture protection than high‑speed varieties. The material’s properties (hardness ~90.5 HRA, TRS ~2.6 GPa) indicate a substrate optimised to reduce crack initiation and growth, giving consistent performance across batch runs. These technical attributes support predictable process windows and improved part‑to‑part repeatability.

Recommended applications and practical limits for reliable results

The geometry is best for longitudinal turning, facing and light profiling of carbon and alloy steels, with recommended starting parameters in the provided ranges: depth of cut approximately 1.0–5.0 mm, feed 0.20–0.50 mm/rev and cutting speeds depending on material group (e.g. 150–400 m/min for many steels). The negative 0° clearance increases cutting forces, therefore the insert suits stable setups and rigid toolholders rather than thin‑walled or vibration‑prone workpieces. It is not the first choice for heavily interrupted cuts, very fine finishing or non‑ferrous materials such as aluminium. For uncertain cases, Metav Werkzeuge offers process consultancy and can provide adapted cutting data to match machine capability and workpiece characteristics.

Discuss Tungaloy T9215 performance and availability with Metav Werkzeuge to find the optimal insert grade and cutting parameters for the intended turning task — contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 for technical guidance and stock information

Technical Data

• Manufacturer/brand: Tungaloy
• Manufacturer article number: 6772176
• SKU: 6772176-Tungaloy
• Series: T9200
• Designation: CNMG120404‑TM
• Product type: Indexable insert for turning
• Country of manufacture: Japan
• Packaging unit: 10 pieces

Core technical numbers

• IC (inscribed circle): 12.70 mm
• Thickness S: 4.76 mm
• Corner radius RE: 0.40 mm
• Cutting edge length L: 12.90 mm
• Effective cutting length LE: 12.08 mm
• Fixing hole diameter D1: 5.16 mm
• Included angle: 80°
• Clearance angle: 0° (negative)
• Usable cutting edges: 4
• Coating thickness: 18 µm
• Substrate hardness: ~90.5 HRA
• Bending strength (TRS): ~2.6 GPa

Design and features

• Rhombic 80° insert shape
• Negative geometry, 0° clearance
• TM double‑sided chipbreaker for medium machining
• CVD coating: Ti‑compound + Al₂O₃ + TiN
• Coated carbide substrate
• Cylindrical fixing hole
• Tolerance class M
• Neutral cutting direction
• Suited for longitudinal, facing and profiling operations

FAQ

What materials is this insert best suited for?
The CNMG120404‑T9215 is optimised for carbon and alloy steels (ISO P10–P20) and can be used on stainless steel and cast iron where process stability permits; it is not recommended as a first choice for aluminium or high‑temperature alloys.

What cutting parameters should be used as a starting point?
Use the manufacturer’s starting ranges: ap 1.0–5.0 mm, feed 0.20–0.50 mm/rev and cutting speeds varying by material (e.g. 150–400 m/min for many steels); these are initial values and must be adapted to machine rigidity and cooling.

How many usable cutting edges are available per insert?
This rhombic insert provides four usable 80° cutting corners derived from its geometry.

Why choose the T9215 grade over a tougher or more wear‑resistant grade?
T9215 offers a compromise between flank wear resistance and fracture protection, making it a universal first choice for medium finishing and productive serial turning where both life and edge security are important.

Is the negative geometry suitable for unstable set‑ups?
Negative geometry increases cutting forces; for unstable or thin‑walled components a positive geometry or a tougher grade is preferable to avoid vibration and edge chipping.

Manufacturer/Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com