Tungaloy SCMT070204-24 NS9530 Insert
High-Speed Steel Finishing | 24 Chipbreaker | Premium NS9530 Cermet Grade
What is the best cermet insert for a mirror finish on steel?
The Tungaloy SCMT070204-24 NS9530 is a specialized cermet turning insert engineered for high-precision finishing operations. Unlike standard carbide, the NS9530 cermet grade provides exceptional chemical stability and resistance to built-up edge, making it the top choice for achieving mirror-like surface finishes on carbon and alloy steels. The 24 chipbreaker is precision-designed for light depths of cut, ensuring excellent chip control even at high cutting speeds. Manufactured in Japan, this CNC square insert offers the dimensional accuracy and edge sharpness required for tight-tolerance aerospace and automotive components.
Superior NS9530 Cermet
Combines high wear resistance with a smooth surface finish. Ideal for high-speed continuous cutting where thermal stability is key.
24 Finishing Breaker
A highly positive rake angle ensures low cutting forces and prevents work hardening, specifically for fine finishing passes.
Anti-Built-Up Edge
The cermet material has low affinity for steel, preventing metal from welding to the tip and ensuring consistent part quality.
Decoding SCMT070204-24 Technical Nomenclature
S
Square
C
7° Relief
M
Tolerance
T
Fixing Hole
07
7.94mm Edge
02
2.38mm Thick
04
0.4mm Rad.
24
Breaker
3. Technical Specifications: Metric vs. Imperial
| Parameter |
Metric (ISO) |
Imperial Equiv. |
| Inscribed Circle (IC) |
7.94 mm |
5/16 inch |
| Thickness (S) |
2.38 mm |
3/32 inch |
| Corner Radius (RE) |
0.4 mm |
0.016 inch |
| Hole Diameter (D1) |
2.8 mm |
0.110 inch |
Recommended Cutting Parameters (NS9530 Cermet)
-
Cutting Speed (Vc): 100 - 300 m/min (High-speed optimized)
-
Feed Rate (f): 0.05 - 0.15 mm/rev (Finishing pass)
-
Depth of Cut (Ap): 0.2 - 1.0 mm (Light finishing)
*Pro Advice: Cermet works best in continuous cuts without heavy interruption. Avoid using heavy coolant if thermal shock is a concern at extreme speeds.*
4. Product Applications
- Mirror-finish turning of carbon and low-alloy steels.
- High-precision finishing of automotive gear components.
- Aerospace precision pin and shaft machining.
- Final-pass machining where dimensional tolerance is +/- 0.01mm.
5. Equipment Compatibility
Standard fit for SSDCN or SSKCR/L turning tool holders for 0702 size square inserts. Fully compatible with high-speed CNC lathes and Swiss-type machines.
7. Why Choose CNCHome-Beyond?
Genuine Tungaloy
100% Original Japan Stock
Industrial Expertise
CNC Tooling Specialists
Quality Verified
Supply Chain for Geely Auto
Global Reach
Fast B2B Logistics
Global Verified Reviews
⭐⭐⭐⭐⭐ "Surface Finish is Incredible" - Markus H., Germany
"We replaced our carbide finishing inserts with these cermets. The surface finish on our C45 steel parts went from good to mirror-like."
⭐⭐⭐⭐⭐ "Best for High Speed" - T. Yamamoto, Japan
"Consistent results even at 250 m/min. The NS9530 grade handles the heat very well."
⭐⭐⭐⭐ "Great Chip Breaking" - David R., USA
"The 24 breaker works perfectly for light cuts. No more long bird-nesting chips during finishing."
⭐⭐⭐⭐⭐ "Reliable B2B Partner" - S. Gupta, India
"Genuine Tungaloy inserts received in original packaging. Exceptional performance on our CNC lathe."
⭐⭐⭐⭐⭐ "Precision Choice" - Luis P., Mexico
"Dimensional accuracy is excellent. We can run 500 parts with almost zero adjustment to the tool offset."
8. FAQ - Finishing Tips
Q: Can I use this for roughing?
A: No. Cermet is brittle compared to carbide. It is strictly for finishing (Ap < 1.0mm) to avoid edge fracture.
Q: Does it work on stainless steel?
A: While it can work on some 300-series stainless, NS9530 is primarily optimized for carbon and alloy steels (ISO P materials).
Q: What tool holder do I need?
A: It fits any standard SCMT 0702 / SCMT 2.5(1.5)1 holder, including Tungaloy's SSDCN series.
Expert Insight: Cermet vs. Carbide
In high-speed finishing, carbide often fails due to chemical wear and heat. The NS9530 Cermet uses a ceramic-metallic hybrid structure that is chemically inert to steel. This ensures the edge stays sharp longer and produces the signature "Tungaloy mirror finish" that carbide simply cannot match at high surface speeds.
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