Tungaloy SNMG120404R-S NS9530 Cermet Insert
Mirror-Finish Right-Hand Steel Turning | NS9530 Cermet Grade | Precision -S Chipbreaker
How do I get a mirror finish on steel parts using a CNC lathe?
The Tungaloy SNMG120404R-S NS9530 is a high-grade cermet turning insert engineered for ultra-precision finishing of ISO P (Steel) and ISO K (Cast Iron) materials. Unlike traditional carbide, the NS9530 cermet grade provides exceptional resistance to oxidation and built-up edge, resulting in a superior, high-gloss surface finish. This Right-Hand (R) specific model features the -S chipbreaker, which is optimized for light depths of cut and excellent chip control. 100% Made in Japan, it is the professional choice for finishing operations where aesthetics and dimensional accuracy are critical.
NS9530 Cermet Advantage
Cermet (Ceramic-Metallic) composition offers higher hardness than carbide. It maintains a sharp cutting edge longer and resists chemical wear at high speeds, ensuring a mirror-like finish.
-S Finishing Geometry
The -S chipbreaker is designed for the finest finishing passes. It effectively breaks chips even at very low feed rates, preventing workpiece scratching and "bird-nesting."
High Oxidation Resistance
NS9530 grade excels in high-speed continuous cutting where heat is a factor. It resists crater wear, extending tool life and maintaining consistent part diameters.
Decoding SNMG120404R-S Technical Nomenclature
S
Square
N
0° Relief
M
Tolerance
G
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
04
0.4mm Rad.
R-S
Right Hand/S
3. Technical Specifications: Metric vs. Imperial
| Parameter |
Metric (ISO) |
Imperial Equivalent |
| Inscribed Circle (IC) |
12.7 mm |
1/2" (SNMG 431R) |
| Thickness (S) |
4.76 mm |
3/16" |
| Corner Radius (RE) |
0.4 mm |
1/64" |
| Substrate Grade |
NS9530 (Cermet) |
Mirror Finish Expert |
Recommended Cutting Parameters (NS9530)
-
Cutting Speed (Vc): 100 - 250 m/min (Standard Steel)
-
Feed Rate (f): 0.05 - 0.20 mm/rev
-
Depth of Cut (ap): 0.2 - 1.2 mm
*Note: Cermet is more brittle than carbide. Avoid interrupted cuts and ensure a rigid setup to maximize tool life.*
4. Product Applications
- Final finishing of high-precision steel shafts.
- Mirror-finish machining for medical and aerospace parts.
- High-speed turning of medium carbon and alloy steels.
- B2B production of decorative or high-tolerance steel hardware.
5. Tool Compatibility
Universal fit for standard ISO Right-Hand Turning Holders (e.g., PSSNR, DSBNR, PSKNR series). Designed for SNMG 1204 pockets. Always check toolholder handedness to match the 'R' designation.
7. Why Choose CNCHome-Beyond?
Genuine Tungaloy
Direct from Japan
Industrial Support
Professional CNC Experts
Global Shipping
Fast B2B Delivery
Quality Control
Tested for CNC Excellence
Global Customer Experience
⭐⭐⭐⭐⭐ "Mirror Finish Every Time" - James H., USA
"Switched from carbide to this NS9530 cermet for our finish passes. The difference is night and day. The parts come off looking polished."
⭐⭐⭐⭐⭐ "Authentic Japan Quality" - F. Schneider, Germany
"Tungaloy cermet is the best in the business. Very consistent sizing across large batches. Shipping was surprisingly fast."
⭐⭐⭐⭐ "Great for Light Cuts" - H. Nakamura, Japan
"The -S chipbreaker is perfect for fine finishing. Chips are small and clean. Highly recommended for steel turning."
⭐⭐⭐⭐⭐ "Excellent B2B Partner" - R. Tan, Singapore
"We buy these in bulk for our production line. Original packaging and excellent technical data provided."
⭐⭐⭐⭐⭐ "Superior to Carbide" - M. Lopez, Spain
"If you need high surface quality, this cermet grade is worth it. Zero built-up edge even after hours of cutting."
8. FAQ - Professional Support
Q: Can cermet inserts handle interrupted cuts?
A: Generally, no. Cermet is more brittle than carbide. For interrupted cuts, use a tougher carbide grade like T9225.
Q: Do I need coolant with NS9530 cermet?
A: High-pressure coolant is recommended to flush chips and maintain thermal stability, though cermet can handle dry finishing in specific conditions.
Q: Does this fit SNMG 431R holders?
A: Yes, SNMG 120404 is the metric equivalent to the Imperial SNMG 431 designation.
Industrial Tip: When to choose Cermet vs Carbide
Use **Carbide (like T9125)** for roughing and heavy medium cutting due to its superior impact strength. Choose **Cermet (like NS9530)** for the final finishing pass. Cermet's chemical stability prevents the steel from welding to the tool, which is what creates that high-gloss, mirror finish. Trust **Tungaloy Japan** for the perfect balance of precision and productivity.
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