Tungaloy DCMT070204-24 NS9530 Turning Insert
High-Speed Steel Finishing Specialist | Premium Cermet Grade | Made in Japan
What is the best insert for achieving a mirror finish on carbon steel?
The Tungaloy DCMT070204-24 NS9530 is a high-performance cermet turning insert designed specifically for precision finishing. Unlike standard carbide, the NS9530 cermet grade provides exceptional chemical stability and resistance to built-up edge (BUE), which is critical for maintaining long-term dimensional accuracy and a high-gloss surface finish. The -24 chipbreaker is engineered for light-duty finishing to medium cutting, offering excellent chip control at varied feed rates. This Japan-made indexable turning tool is a favorite for CNC machining shops that prioritize surface aesthetics and tight tolerances in steel applications. By utilizing this long-tail keywords optimized insert, you can push cutting speeds higher while ensuring your tool life remains predictable and efficient.
Decoding the DCMT070204-24 Technical Nomenclature
D
55° Rhombic
C
7° Clearance
M
M Tolerance
T
Hole & Screw
07
7.8mm Edge
02
2.38mm Thick
04
0.4mm Radius
-24
Finishing
Technical Specs: Metric vs. Imperial Comparison
| ISO Parameter |
Metric Designation |
Imperial Designation |
| ISO/ANSI Model |
DCMT070204-24 |
DCMT21.51-24 |
| Inscribed Circle (IC) |
6.35 mm |
1/4 inch |
| Thickness (S) |
2.38 mm |
3/32 inch |
| Corner Radius (RE) |
0.4 mm |
0.016 inch |
Why should I choose NS9530 cermet for precision finishing?
The NS9530 Grade is a specialized cermet (Ceramic-Metal) material that offers higher hardness and lower affinity for steel than standard tungsten carbide. This makes the DCMT070204-24 unbeatable for precision machining where surface brightness is mandatory. The -24 chipbreaker is designed with a balanced geometry that handles varying depths of cut effectively. In CNC machining, this indexable turning tool excels at high cutting speeds, where the cermet substrate maintains its edge sharpness far longer than coated carbide. If you are looking for a long-tail keywords solution for finishing carbon and alloy steels, this is the industry standard.
Recommended Cutting Parameters (NS9530)
-
Cutting Speed (Vc): 150 - 350 m/min
-
Feed Rate (f): 0.05 - 0.20 mm/rev
-
Depth of Cut (ap): 0.2 - 1.5 mm
*Optimization Tip: Cermet performs best at higher speeds. For the best surface finish, ensure your machine can reach the recommended RPM.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Mirror Finish Success" - Alexander P., Germany
"The NS9530 grade is incredible for steel. We replaced our old carbide finishing inserts and the difference in surface Ra is night and day. Mirror finish without extra polishing."
⭐⭐⭐⭐⭐ "Best for High Speed" - John D., USA
"Ran these at 300 m/min and they didn't even flinch. The tool life on this cermet is much better than I expected for such a sharp edge."
⭐⭐⭐⭐ "Very Sharp Edge" - Kenji S., Japan
"Typical Tungaloy precision. The 070204 size is perfect for our small-diameter work. Very stable dimensions throughout the entire run."
⭐⭐⭐⭐⭐ "Predictable Wear" - Luca M., Italy
"The -24 breaker works well even when we push the feed a bit. No unexpected chipping. Authentic Tungaloy quality."
⭐⭐⭐⭐⭐ "Highly Recommended" - Sarah W., UK
"Great results on carbon steel. The brightness of the part after the pass is exactly what our customer wanted. Fast shipping too."
Technical Tooling Q&A
Q: Can I use this for stainless steel?
A: While NS9530 is optimized for carbon and alloy steels, it can handle light finishing on some stainless series. However, for sticky stainless, a PVD carbide might be better.
Q: Does cermet require coolant?
A: Cermet can be used dry due to its heat resistance, but for finishing, light coolant often helps with chip evacuation and surface luster. Avoid thermal shock.
Q: Which tool holder series fits this insert?
A: This fits standard ISO holders for DCMT 0702 inserts, such as the SDJCR/L series or various boring bars (S...-SDUCR).
Expert Tip: Cermet vs. Carbide Comparison
For precision machining, Cermet (NS9530) provides much higher resistance to chemical wear than Tungsten Carbide. If you are experiencing "built-up edge" where metal sticks to your tool, switching to cermet will immediately improve your surface Ra and dimensional consistency.
© Technical Content by cnchome-beyond.com - Japan Tooling Excellence
