Tungaloy CNMG120404R-S NS9530 Cermet Insert
Precision Right-Hand Finishing | NS9530 Cermet Grade | Made in Japan
What is the best cermet insert for high-gloss steel finishing?
The Tungaloy CNMG120404R-S NS9530 is a premier cermet turning insert specifically engineered for high-precision finishing operations. The NS9530 grade is a non-coated cermet that offers incredible chemical stability and resistance to built-up edge (BUE), resulting in a mirror-like surface finish on carbon and alloy steels. This indexable turning tool features a Right-Hand (R) orientation and the specialized -S chipbreaker, which is optimized for light cutting depths and excellent chip control. Ideal for CNC machining where dimensional accuracy and aesthetic brilliance are paramount, this Japan-made precision machining tool is the industry standard for high-speed finishing. By using this long-tail keywords optimized solution, you can achieve extended tool life while maintaining tight tolerances.
Decoding the CNMG120404R-S Technical Nomenclature
C
80° Rhombic
N
0° Clearance
M
M Tolerance
G
Double Sided
12
12.9mm Edge
04
4.76mm Thick
04R
0.4mm Right
-S
S-Breaker
Technical Specs: Metric vs. Imperial Conversion
| Standard Detail |
Metric (Standard) |
Imperial Equiv. |
| ISO / ANSI Designation |
CNMG120404R-S |
CNMG431R-S |
| Inscribed Circle (IC) |
12.7 mm |
1/2 inch |
| Corner Radius (RE) |
0.4 mm |
1/64 inch |
How does the -S chipbreaker improve finishing precision?
The -S Chipbreaker is a specialized geometry designed for low cutting resistance. In CNC machining finishing passes, avoiding vibration (chatter) is essential for a high-quality surface. The -S breaker ensures stable chip evacuation even at very shallow depths of cut. When paired with the NS9530 cermet grade, which maintains edge sharpness significantly longer than coated carbide, this indexable turning tool delivers unmatched consistency. This precision machining combination is the preferred choice for automotive and aerospace components where surface integrity and tool life are critical benchmarks.
Recommended Cutting Parameters for NS9530
Optimized for P (Steel) and K (Cast Iron) finishing:
-
Cutting Speed (Vc): 120 - 350 m/min
-
Feed Rate (f): 0.05 - 0.20 mm/rev
-
Depth of Cut (ap): 0.2 - 1.5 mm
*Pro Tip: For a "mirror" finish, utilize higher cutting speeds with a constant coolant supply to protect the cermet edge.*
Feedback from Global Machinists
⭐⭐⭐⭐⭐ "Brilliant Right-Hand Finish" - Markus E., Germany
"The R-S orientation is perfect for our external finishing cycles. The NS9530 grade gives the steel a polished look right off the lathe."
⭐⭐⭐⭐⭐ "Mirror Surface" - Kenji H., Japan
"Authentic Tungaloy quality. The cermet stays sharp much longer than my previous carbide inserts. Highly recommended for precision work."
⭐⭐⭐⭐ "Great Chip Control" - David B., USA
"Excellent for light finishing passes. The -S breaker prevents stringy chips from tangling on the part. Very reliable tool life."
⭐⭐⭐⭐⭐ "High Speed Stability" - Luca M., Italy
"We run these at 300m/min and the edge remains perfect. It's the only way to get that high-gloss finish our customers demand."
⭐⭐⭐⭐⭐ "Original & Fast" - Tan L., Singapore
"Genuine Tungaloy Japan stock. Excellent performance for precision CNC turning. Very fast shipping to our workshop."
Technical Tooling Q&A
Q: Can I use a Right-Hand (R) insert in a Left-Hand holder?
A: No. Right-Hand (R) inserts must be paired with Right-Hand tool holders to ensure the cutting geometry and chipbreaker align correctly with the workpiece.
Q: Is cermet suitable for heavy roughing?
A: No. Cermet is optimized for finishing due to its high hardness and lower toughness. For heavy roughing, use a CVD grade like T9125.
Q: Why choose NS9530 over standard carbide?
A: NS9530 cermet has a much lower affinity for steel, meaning it resists chemical bonding and built-up edge, which is the key to a superior surface finish.
Expert Insight: The Cermet Advantage
For precision machining where aesthetic quality is as important as dimensional accuracy, Cermet (NS9530) is the superior choice. It allows for high-speed finishing that leaves a professional, high-gloss surface without the need for secondary polishing.
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