Tungaloy DNMG150412-TM T9115 Turning Insert
Maximum Edge Strength | Premium T9115 CVD Grade | Made in Japan
What is the most durable insert for heavy-duty steel turning?
The Tungaloy DNMG150412-TM T9115 is a high-performance CVD coated carbide turning insert engineered for high-speed, heavy-duty machining of carbon and alloy steels. Utilizing the industry-leading T9115 grade, this insert features a thick alumina layer that serves as a superior thermal shield, preventing heat-induced deformation at high cutting speeds. The 1.2mm corner radius provides the ultimate edge strength, making it ideal for high-feed rates and challenging skin cuts on steel workpieces. Equipped with the -TM chipbreaker, it offers exceptional chip control across a wide range of medium cutting applications. This Japan-made indexable turning tool is the professional CNC machining solution for those requiring long tool life and maximum metal removal rates. Incorporating this long-tail keywords optimized insert into your production line will drastically improve throughput and stability.
Decoding the DNMG150412-TM Technical Nomenclature
D
55° Rhombic
N
0° Clearance
M
M-Tolerance
G
Double Sided
15
15.5mm Edge
04
4.76mm Thick
12
1.2mm Radius
-TM
Semi-Finish
Technical Specs: Metric vs. Imperial Comparison
| ISO Parameter |
Metric Unit |
Imperial Designation |
| ISO Model Name |
DNMG150412-TM |
DNMG433-TM |
| Inscribed Circle (IC) |
12.7 mm |
1/2 inch |
| Corner Radius (RE) |
1.2 mm |
3/64 inch |
How does the T9115 grade handle high-feed rates?
The T9115 Grade is the ultimate solution for high-speed steel turning. In precision machining, stability is paramount; the 1.2mm radius of this indexable turning tool offers massive resistance to chipping, allowing for significantly higher feed rates than smaller radii. The -TM chipbreaker uses a multi-stage chip-breaking geometry that maintains efficiency even at deeper cuts. For CNC machining of rough castings or forged steel, the robust substrate and heat-resistant CVD coating ensure that tool wear is predictable and catastrophic failure is minimized.
Recommended Cutting Parameters (T9115)
-
Cutting Speed (Vc): 150 - 350 m/min (Recommended for Alloy Steel)
-
Feed Rate (f): 0.20 - 0.60 mm/rev
-
Depth of Cut (ap): 1.0 - 5.0 mm
*Pro Tip: With a 1.2mm radius, you can push the feed to 0.6mm/rev for rapid roughing while maintaining an acceptable surface for finishing passes.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Rugged and Reliable" - David M., USA
"The 1.2mm radius is a beast. We use these on forged 4340 shafts and the tool life in T9115 is 30% better than our previous CVD inserts."
⭐⭐⭐⭐⭐ "Excellent High-Speed Performance" - K. Schmidt, Germany
"T9115 is perfect for continuous high-speed turning. We run them at 320 m/min and the coating doesn't flake. High efficiency at its best."
⭐⭐⭐⭐ "Great for Heavy Roughing" - H. Nakamura, Japan
"Consistent chip breaking at 4mm DOC. The -TM breaker handles the heavy loads very well. Very stable Japan quality."
⭐⭐⭐⭐⭐ "Impressive Feed Rates" - Matteo F., Italy
"Was able to increase our feed rate by 25% without sacrificing tool stability. T9115 is a very tough grade for production."
⭐⭐⭐⭐⭐ "Perfect for Production" - James B., UK
"The 150412 size gives extra stability. These inserts are our first choice for high-volume steel components."
Technical Tooling Q&A
Q: Can I use T9115 for interrupted cuts?
A: T9115 is optimized for continuous high-speed turning. For heavy interrupted cuts, T9125 would be a more suitable choice due to increased toughness.
Q: Why choose a 1.2mm radius (12) over a 0.8mm (08)?
A: The 1.2mm radius offers a stronger cutting edge and better heat dissipation, allowing for higher feed rates and better durability in roughing operations.
Q: Which tool holder fits the DNMG1504 size?
A: It fits standard ISO holders like DDJNR/L 2525M15 or PDJNR/L 2020K15 using the 15mm (4xx) seat size.
Expert Choice: CVD Carbide vs. PVD Carbide
For high-volume steel turning, CVD Coated Carbide (T9115) is the superior choice over PVD due to its thick thermal coating. This protects your indexable turning tool during long continuous cuts, ensuring maximum efficiency and minimal tool changes.
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