Tungaloy DNMG150408R-S NS9530 Cermet Insert
Mirror Surface Finishing | Premium NS9530 Cermet | Made in Japan
What is the best cermet insert for high-speed steel finishing?
The Tungaloy DNMG150408R-S NS9530 is a high-performance cermet turning insert specifically engineered for high-precision finishing operations. The NS9530 cermet grade offers an unparalleled combination of hardness and chemical stability, effectively preventing built-up edge (BUE) and ensuring a superior surface aesthetic. This Right-Hand (R) configuration with the -S chipbreaker is optimized for light depths of cut and maintaining tight tolerances on carbon and alloy steels. As a professional indexable turning tool made in Japan, it is the preferred choice for CNC machining shops that prioritize surface quality and consistent tool life. Integrating this long-tail keywords optimized insert into your workflow will significantly reduce the need for secondary grinding or polishing.
Decoding the DNMG150408R-S Technical Nomenclature
D
55° Rhombic
N
0° Clearance
M
M-Tolerance
G
Double Sided
15
15.5mm Edge
04
4.76mm Thick
08R
0.8mm Right
-S
Finish Chip
Technical Specs: Metric vs. Imperial Comparison
| ISO Parameter |
Metric Unit |
Imperial Designation |
| ISO Model Name |
DNMG150408R-S |
DNMG432R-S |
| Inscribed Circle (IC) |
12.7 mm |
1/2 inch |
| Thickness (S) |
4.76 mm |
3/16 inch |
| Corner Radius (RE) |
0.8 mm |
1/32 inch |
Recommended Cutting Parameters (NS9530)
-
Cutting Speed (Vc): 150 - 350 m/min (Optimal for High Speed)
-
Feed Rate (f): 0.10 - 0.25 mm/rev
-
Depth of Cut (ap): 0.2 - 2.0 mm
*Pro Tip: Cermet is designed for high-speed light cutting. For best surface results, avoid low speeds to prevent vibration.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Mirror Surface Finish" - David K., USA
"The NS9530 grade produces a finish that looks like it was ground. The 0.8mm radius gives great strength for the final pass. Highly satisfied."
⭐⭐⭐⭐⭐ "Stable Dimensional Control" - M. Fischer, Germany
"Very low heat expansion. These cermet inserts hold tolerances beautifully over long production runs. Excellent Japan quality."
⭐⭐⭐⭐ "Great for Harder Steels" - Satoshi N., Japan
"The R-S configuration is perfect for my Right-hand holders. Chip control is very consistent at high finishing speeds."
⭐⭐⭐⭐⭐ "Reliable and Fast" - Luca G., Italy
"Top-tier finishing tool. We pushed the RPM and the insert didn't flinch. Surface Ra is perfect."
⭐⭐⭐⭐⭐ "Superior Cermet" - Tom B., UK
"Original Tungaloy stock. The 0.8mm radius is much tougher than 0.4mm for finishing passes that have a bit of variation."
Technical Tooling Q&A
Q: Is NS9530 better than carbide for finishing?
A: Yes. Cermet has lower chemical affinity with steel, which prevents "built-up edge" and results in a significantly smoother, shinier surface finish than carbide.
Q: What is the benefit of the 0.8mm (08) radius for finishing?
A: A 0.8mm radius provides a stronger cutting edge and allows for a slightly higher feed rate while still maintaining a high-quality surface finish compared to a 0.4mm radius.
Q: Does Right-Hand (R) matter for my lathe?
A: Yes. This insert is designed for Right-Hand tool holders. Ensure your machine rotation and holder orientation are compatible with R-type inserts.
Expert Comparison: Cermet vs. CVD Carbide
In precision machining, NS9530 Cermet is the gold standard for aesthetics. While CVD Coated Carbide excels at heavy roughing and toughness, Cermet is the master of high-speed surface integrity. Reserve this for your final 0.2mm to 1.5mm pass.
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