Tungaloy EPGT040104L-W08 NS9530 Cermet Insert
High-Speed Precision Boring | Premium NS9530 Cermet Grade | Made in Japan
What is the best cermet insert for small diameter mirror-finish boring?
The Tungaloy EPGT040104L-W08 NS9530 is a premier cermet turning insert specifically engineered for ultra-precision micro-boring and small-part internal finishing. The NS9530 cermet grade offers an exceptional fine-grained structure that maintains a sharp cutting edge and provides unmatched resistance to built-up edge (BUE). The -W08 chipbreaker is specialized for finishing, ensuring smooth chip evacuation in tight internal spaces. As a Japan-made indexable boring tool, it is the professional CNC machining choice for aerospace, medical, and precision instrument industries. Integrating this long-tail keywords optimized insert into your production cycle ensures superior tool life and a brilliant aesthetic finish on steel and stainless steel components.
Decoding the EPGT040104L-W08 Technical Nomenclature
E
75° Rhombic
P
11° Relief
G
G-Tolerance
T
Screw Lock
04
4.7mm Edge
01
1.2mm Thick
04L
0.4mm Left
-W08
Finish Breaker
Technical Specs: Metric vs. Imperial Comparison
| ISO Parameter |
Metric Unit |
Imperial Equiv. |
| ISO Model Name |
EPGT040104L-W08 |
EPGT1.511L-W08 |
| Inscribed Circle (IC) |
4.76 mm |
3/16 inch |
| Thickness (S) |
1.2 mm |
0.047 inch |
| Corner Radius (RE) |
0.4 mm |
1/64 inch |
Recommended Cutting Parameters (NS9530)
-
Cutting Speed (Vc): 100 - 250 m/min (High-Speed Finishing)
-
Feed Rate (f): 0.03 - 0.15 mm/rev
-
Depth of Cut (ap): 0.05 - 1.0 mm
*Pro Tip: For micro-boring, ensure minimal tool overhang to maximize the stability and surface finish quality of the Japan cermet.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Mirror Surface internal Finish" - Alexander R., Germany
"The Ra value we achieved on alloy steel parts is ground-quality. The 0.4mm radius is very strong for a small boring insert. Highly satisfied."
⭐⭐⭐⭐⭐ "Perfect for Small Parts" - Kenji T., Japan
"Consistent boring in tight diameters. No built-up edge even after hours of high-speed running. Japan-made excellence."
⭐⭐⭐⭐ "Stable and Sharp" - Matteo V., Italy
"Holds dimensional tolerances perfectly over long production cycles. The -W08 breaker manages chips well in small bores."
⭐⭐⭐⭐⭐ "Great for CNC Swiss" - Michael S., USA
"Best finishing tool for our Swiss lathes. The surface aesthetic is unmatched. Quick delivery and original Tungaloy stock."
⭐⭐⭐⭐⭐ "High Value Cermet" - S. Clarke, UK
"Switching to NS9530 reduced our polishing time by 50%. The tool life is very predictable. A top-tier finishing choice."
Technical Tooling Q&A
Q: Can I use this for roughing?
A: No. Cermet is more brittle than carbide. This EPGT geometry is strictly for final passes (0.05 - 1.0mm) to achieve precision dimensions and surface Ra.
Q: Is Left (L) or Right (R) better for my lathe?
A: This is an "L" (Left-Hand) insert. It must be paired with a Left-Hand boring bar. Match your tool holder orientation carefully to your spindle rotation.
Q: Does it work on stainless steel?
A: Yes. NS9530 cermet is excellent for finishing stainless steel because it prevents the material from sticking to the cutting edge (no built-up edge).
Expert Comparison: NS9530 Cermet vs. Coated Carbide
In precision machining, NS9530 Cermet provides the ultimate aesthetic edge. While CVD Coated Carbide is built for heavy roughing, Cermet is the master of high-speed surface integrity and dimensional accuracy in finishing cycles.
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