Tungaloy EPGT040102L-W08 NS9530 Cermet Insert
Ultra-Precision Boring | Premium NS9530 Cermet | Crafted in Japan
What is the best boring insert for high-precision small hole finishing?
The Tungaloy EPGT040102L-W08 NS9530 is a high-accuracy cermet turning insert specifically designed for micro-boring and small-diameter internal finishing. The NS9530 cermet grade is engineered with a fine-grained structure that provides a sharp, stable cutting edge and exceptional resistance to built-up edge (BUE). The -W08 chipbreaker is optimized for ultra-light depths of cut, ensuring superior chip evacuation in confined spaces. This Japan-made indexable boring tool is the professional CNC machining choice for medical, aerospace, and watchmaking industries where dimensional consistency and surface Ra are paramount. Integrating this long-tail keywords optimized insert into your production provides longer tool life and unmatched surface brilliance.
Decoding the EPGT040102L-W08 Technical Nomenclature
E
75° Rhombic
P
11° Relief
G
G-Tolerance
T
Screw Lock
04
4.7mm Edge
01
1.2mm Thick
02L
0.2mm Left
-W08
Finish Breaker
Technical Specs: Metric vs. Imperial Comparison
| ISO Parameter |
Metric Unit |
Imperial Designation |
| ISO Model Name |
EPGT040102L-W08 |
EPGT1.510.5L-W08 |
| Inscribed Circle (IC) |
4.76 mm |
3/16 inch |
| Thickness (S) |
1.2 mm |
0.047 inch |
| Corner Radius (RE) |
0.2 mm |
0.008 inch |
Recommended Cutting Parameters (NS9530)
-
Cutting Speed (Vc): 100 - 250 m/min (High-Speed Fine Finishing)
-
Feed Rate (f): 0.03 - 0.12 mm/rev
-
Depth of Cut (ap): 0.05 - 0.8 mm
*Pro Tip: For micro-boring, ensure minimal tool overhang to maintain rigidity. Cermet requires constant speed to achieve the best surface Ra.*
Global Machinist Feedback
⭐⭐⭐⭐⭐ "Perfect for Watch Parts" - B. Muller, Switzerland
"Using the EPGT04 for tiny brass and steel components. The surface finish is absolute mirror. NS9530 is remarkably sharp."
⭐⭐⭐⭐⭐ "Excellent Boring Control" - R. Tanaka, Japan
"Minimal vibration in small holes. The 0.2mm radius is perfect for sharp corners and tight tolerances. Tungaloy quality is unmatched."
⭐⭐⭐⭐ "Great Chip Management" - John D., USA
"Even at 0.05mm depth of cut, the -W08 breaker breaks chips cleanly. No birdnesting inside the holes."
⭐⭐⭐⭐⭐ "Mirror Surface" - Luca B., Italy
"We use this for precision valve seats. The shine on the steel is ground-quality. Very reliable cermet grade."
⭐⭐⭐⭐⭐ "Long Tool Life" - A. Clarke, UK
"Holds size perfectly over long runs. Fast shipping and the inserts arrived in original Tungaloy packaging."
Technical Tooling Q&A
Q: Is Cermet better than Carbide for micro-boring?
A: Yes. Cermet has lower chemical affinity with the workpiece, preventing built-up edge and maintaining a sharper edge longer for finishing cycles.
Q: What is the difference between Left (L) and Right (R) in this model?
A: This is an "L" (Left-hand) insert. It must be paired with a corresponding Left-hand boring bar. Match your tool holder orientation carefully.
Q: Can I use this for roughing?
A: No. Cermet is brittle. The 0.2mm radius and EPGT geometry are strictly for final aesthetic finishing and dimensional sizing.
Expert Comparison: Cermet Finishing
In precision machining, NS9530 Cermet provides the aesthetic edge. While CVD Coated Carbide is built for heavy strength, Cermet is the master of high-speed surface integrity. Protect your indexable turning tool by reserving this grade for final passes.
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