Tungaloy CNMG120408-TS NS9530 Turning Insert
High-Speed Steel Finishing | Premium NS9530 Cermet Grade | Made in Japan
How do I get a mirror finish on steel parts with high-speed turning?
The Tungaloy CNMG120408-TS NS9530 is a professional-grade cermet turning insert engineered for high-precision finishing operations on steel workpieces. Unlike traditional carbide, the NS9530 cermet grade provides exceptional chemical stability and resistance to oxidation, making it the ideal choice for preventing built-up edge (BUE) and ensuring a superior surface luster. This indexable turning tool features the specialized -TS chipbreaker, designed with a sharp cutting edge and optimized geometry for light-duty finishing passes with excellent chip control. Whether you are conducting CNC machining on carbon steel or low-alloy steel, this Japan-made precision machining tool delivers dimensional stability and extended tool life. By choosing this long-tail keywords optimized solution, you gain a high-performance insert that excels in maintaining tight tolerances and high surface integrity.
Decoding the CNMG120408-TS Technical Nomenclature
C
80° Rhombic
N
0° Clearance
M
M Tolerance
G
Hole & Clamps
12
12.9mm Edge
04
4.76mm Thick
08
0.8mm Radius
-TS
Finish Cut
Technical Specifications: Metric vs. Imperial Designations
| Feature |
Metric Designation |
Imperial Designation |
| ISO / ANSI Model |
CNMG120408-TS |
CNMG432-TS |
| Inscribed Circle (IC) |
12.7 mm |
1/2 inch |
| Corner Radius (RE) |
0.8 mm |
1/32 inch |
Why is NS9530 cermet preferred for steel finishing?
The NS9530 cermet grade is a non-coated titanium-based carbonitride grade. Its primary advantage in precision machining is its low affinity for steel, which drastically reduces the chances of built-up edge even at high surface speeds. The 0.8mm radius on the CNMG120408-TS provides a robust balance between edge strength and surface finish quality. Combined with the -TS chipbreaker, which is optimized for small depths of cut and low feed rates, this indexable turning tool ensures that chips are broken into small, manageable pieces that do not scratch the workpiece. For high-speed CNC machining, NS9530 allows you to run faster than carbide while maintaining a sharp edge for a longer duration, resulting in impeccable surface finishes.
Recommended Cutting Parameters for NS9530
-
Cutting Speed (Vc): 150 - 350 m/min (Standard Steels)
-
Feed Rate (f): 0.05 - 0.25 mm/rev
-
Depth of Cut (ap): 0.2 - 1.5 mm
*Pro Tip: For a mirror-like finish, prioritize higher cutting speeds (Vc) and a feed rate below 0.15 mm/rev.*
Feedback from Global Precision Shops
⭐⭐⭐⭐⭐ "Mirror Surface Finish" - James R., USA
"The 0.8mm radius is perfect. I used these for finishing 1045 steel shafts and the result was like a mirror. NS9530 is very stable."
⭐⭐⭐⭐⭐ "Best Cermet in the Market" - Hiroki S., Japan
"Tungaloy's cermet technology is second to none. The -TS breaker works perfectly at low feed rates. Highly recommended for finish turning."
⭐⭐⭐⭐ "Great for tight tolerances" - Guenther K., Germany
"Dimensional accuracy is excellent. I can run 100 parts and the diameter doesn't change by more than 0.005mm."
⭐⭐⭐⭐⭐ "No Built-up Edge" - Liam O., Australia
"The chemical stability is what makes this grade shine. No BUE even at high speeds. Very clean cutting action."
⭐⭐⭐⭐⭐ "Authentic Quality" - Tan W., Singapore
"Genuine Tungaloy Japan. Shipping was fast and the performance matches the technical catalog exactly. Perfect for finishing."
Technical Tooling Q&A
Q: Can I use this cermet insert for interrupted cuts?
A: Cermet is more brittle than carbide. It is primarily for continuous finishing. For heavy interrupted cuts, we recommend a coated carbide grade like T9125.
Q: Is coolant required for NS9530?
A: Coolant is recommended to maintain temperature consistency, but cermet can also be used for dry finishing due to its high chemical stability.
Q: What is the benefit of the -TS chipbreaker?
A: The -TS (Targeted Sharp) breaker is designed specifically for finishing. It features a sharp edge to reduce cutting forces and break small, thin chips at low feed rates.
Expert Tip: Cermet vs. Carbide Finishing
For precision machining, Cermet (NS9530) provides superior surface luster and longer edge sharpness than carbide. While carbide is tougher for roughing, cermet is your secret weapon for achieving a "grinding-like" finish on CNC lathes.
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