Tungaloy DCMT11T308-PS NS9530 Turning Insert
High-Stability Finishing Master | Premium NS9530 Cermet | Made in Japan
How do I achieve a stable mirror finish on carbon steel?
The Tungaloy DCMT11T308-PS NS9530 is a world-class cermet turning insert designed for high-precision finishing where edge strength and surface luster are critical. The NS9530 cermet grade provides exceptional chemical stability, effectively preventing the built-up edge (BUE) that often degrades surface quality in steel machining. With a 0.8mm corner radius, this insert offers increased edge strength and a wider feed range compared to smaller radii, making it ideal for stable finishing passes. The -PS chipbreaker (Polish Style) is engineered to provide excellent chip control at light to medium finishing depths. This Japan-made indexable turning tool is the perfect CNC machining choice for those requiring high-gloss finishes and extended tool life. By utilizing this long-tail keywords optimized insert, you ensure maximum productivity and professional results in every pass.
Decoding the DCMT11T308-PS Technical Nomenclature
D
55° Rhombic
C
7° Clearance
M
M-Tolerance
T
Hole & Screw
11
11.6mm Edge
T3
3.97mm Thick
08
0.8mm Radius
-PS
Polish Style
Technical Specs: Metric vs. Imperial Comparison
| ISO Parameter |
Metric Designation |
Imperial Designation |
| ISO Model |
DCMT11T308-PS |
DCMT32.52-PS |
| Inscribed Circle (IC) |
9.525 mm |
3/8 inch |
| Thickness (S) |
3.97 mm |
5/32 inch |
| Corner Radius (RE) |
0.8 mm |
1/32 inch |
What are the benefits of the PS chipbreaker on steel?
The NS9530 Grade is a specialized cermet (ceramic-metal composite) that maintains high hardness at elevated temperatures, far outperforming standard carbide in steel finishing. In precision machining, the chemical inertness of cermet prevents the "welding" of work material to the edge. The -PS chipbreaker is Tungaloy's "Polish Style" geometry, featuring a sharp rake to peel away material cleanly even at light depths of cut. For CNC machining operators, the 0.8mm radius provides the stability needed for slightly higher feed rates while maintaining an excellent shine. This indexable turning tool is the ultimate solution for high-productivity steel finishing.
Recommended Cutting Parameters (NS9530)
-
Cutting Speed (Vc): 150 - 350 m/min
-
Feed Rate (f): 0.08 - 0.25 mm/rev
-
Depth of Cut (ap): 0.2 - 1.5 mm
*Pro Tip: Cermet thrives at high cutting speeds. If your lathe has the RPM capacity, push the Vc into the higher range for a better surface finish.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Mirror Surface Results" - David L., USA
"The Ra finish on 4140 steel is incredible. The 0.8mm radius gives great stability and the shine is better than any carbide tool I've used."
⭐⭐⭐⭐⭐ "Japan Quality" - K. Schmidt, Germany
"Ran these at 300m/min and the parts came out looking polished. Tungaloy NS9530 is always reliable for our finishing passes."
⭐⭐⭐⭐ "Great Chip Control" - Hiroshi S., Japan
"The -PS breaker manages chips perfectly even at light depths. Very stable tool for high-volume CNC production."
⭐⭐⭐⭐⭐ "Consistent Tool Life" - Marco G., Italy
"Cermet stays sharp much longer than coated carbide for finishing. No more stopping to adjust offsets every few parts."
⭐⭐⭐⭐⭐ "Fast Shipping & Genuine" - Sarah J., UK
"Original Tungaloy inserts. They work exactly as described in the technical manual. Excellent results for our workshop."
Technical Tooling Q&A
Q: Can I use this for stainless steel finishing?
A: NS9530 is a steel specialist. While it can handle very light finishing on some stainless, we recommend a PVD carbide grade for sticky materials like 304 or 316.
Q: Does cermet require coolant for best results?
A: Cermet can be used dry due to high heat resistance. However, for a superior mirror finish, light coolant helps with chip evacuation. Avoid interrupted flow.
Q: What tool holder fits this DCMT 11T3?
A: This fits standard ISO holders like the SDJCR/L or SDNCN series. Ensure your holder is in good condition for the best surface finish.
Expert Tip: Cermet vs. Carbide for Ra Finish
In precision machining, Cermet (NS9530) provides much higher resistance to chemical wear than Tungsten Carbide. This results in the brilliant "high-gloss" finish that your customers expect, while maintaining tighter tolerances for longer periods.
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