Tungaloy DNMG110408-TM T9115 Turning Insert
Optimized Steel Machining | Premium T9115 CVD Grade | Made in Japan
What is the most durable insert for high-speed steel turning?
The Tungaloy DNMG110408-TM T9115 is a high-performance CVD coated carbide turning insert engineered specifically for high-speed continuous machining of steel. Utilizing the advanced T9115 grade, this insert features Tungaloy's "PremiumTec" surface technology, which significantly reduces friction and prevents built-up edge. The 0.8mm corner radius provides exceptional edge strength, making it perfect for medium-duty cutting and semi-finishing. Combined with the -TM chipbreaker, it ensures stable chip control across a wide range of feed rates. This Japan-made indexable turning tool is a top-tier CNC machining solution for operators who demand long tool life and predictable wear patterns in carbon and alloy steels. Incorporating this long-tail keywords optimized insert into your workflow will maximize your shop's efficiency and output.
Decoding the DNMG110408-TM Technical Nomenclature
D
55° Rhombic
N
0° Clearance
M
M-Tolerance
G
Double Sided
11
11.6mm Edge
04
4.76mm Thick
08
0.8mm Radius
-TM
Semi-Finish
Technical Specs: Metric vs. Imperial Comparison
| ISO Parameter |
Metric Unit |
Imperial Designation |
| ISO Model Name |
DNMG110408-TM |
DNMG332-TM |
| Inscribed Circle (IC) |
9.525 mm |
3/8 inch |
| Corner Radius (RE) |
0.8 mm |
1/32 inch |
Why is T9115 the best for CNC steel turning?
The T9115 Grade is specifically balanced for high-speed steel applications. It utilizes a thick Al2O3 layer that reflects thermal energy back into the chip, protecting the carbide core. In precision machining, stability at high feeds is vital; the 0.8mm radius of this indexable turning tool offers superior resistance to flank wear and chipping. The -TM chipbreaker (Semi-Finishing) provides a low-friction cutting action that prevents built-up edge, ensuring your CNC machining process remains efficient even during long production cycles.
Recommended Cutting Parameters (T9115)
-
Cutting Speed (Vc): 150 - 350 m/min (Steel)
-
Feed Rate (f): 0.15 - 0.45 mm/rev
-
Depth of Cut (ap): 0.5 - 3.5 mm
*Note: Ensure rigid machine setup to maximize the performance of the 0.8mm radius during higher feed rates.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Excellent Tool Life" - David K., USA
"T9115 is incredibly tough. I run these on 4140 steel at 300m/min and they hold up much longer than my previous inserts. Very predictable wear."
⭐⭐⭐⭐⭐ "Consistent Performance" - M. Berger, Germany
"The TM chipbreaker is very versatile for semi-finishing. We see very consistent results across large batches. Japan quality at its best."
⭐⭐⭐⭐ "Great Chip Control" - Yuto S., Japan
"Handles chips perfectly at medium depths. Very stable in our automated lathes. Highly recommended for steel production."
⭐⭐⭐⭐⭐ "Fast Delivery & Original" - P. Rossi, Italy
"Genuine Tungaloy inserts. They handle alloy steel beautifully. Performance matches the technical specs perfectly."
⭐⭐⭐⭐⭐ "Superior Edge Strength" - Sarah J., UK
"The 0.8mm radius is very robust. Perfect for when we need a bit more speed without worrying about the tip chipping."
Technical Tooling Q&A
Q: Can I use T9115 for interrupted cuts?
A: T9115 is optimized for continuous high-speed cutting. For heavy interrupted cuts, Tungaloy's T9125 grade may provide slightly better toughness.
Q: What is the benefit of the 0.8mm radius (08)?
A: It provides a stronger edge than the 0.4mm version and allows for higher feed rates, which reduces overall machining time.
Q: Which tool holder fits the DNMG1104 size?
A: It fits standard ISO holders like DDJNR/L or PDJNR/L using the 1104 (or 33x) seat size.
Expert Tip: CVD Carbide for Productivity
In precision machining, CVD Coated Carbide (T9115) is the ultimate choice for stability. It provides the heat resistance needed for long continuous cuts, ensuring your CNC machining process remains efficient and cost-effective.
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