Tungaloy SNMG120408R-S NS9530 Cermet Insert
High-Gloss Right-Hand Steel Machining | NS9530 Cermet Grade | Precision -S Chipbreaker
What is the best cermet insert for mirror-finish steel turning?
The Tungaloy SNMG120408R-S NS9530 is a high-performance cermet turning insert specifically engineered for achieving superior surface quality in ISO P (Steel) and ISO K (Cast Iron) applications. By utilizing the advanced NS9530 cermet grade, this insert offers exceptional chemical stability and resistance to built-up edge, resulting in a mirror-like high-gloss finish. This Right-Hand (R) model features the specialized -S chipbreaker, designed for light-to-medium finishing where precise chip control is a necessity. 100% Made in Japan, it is the professional choice for CNC workshops requiring aesthetic perfection and long-lasting edge sharpness.
NS9530 Cermet Advantage
This ceramic-metallic grade provides higher hardness than standard carbide. It maintains a sharp cutting edge at high speeds, significantly reducing friction and preventing metal welding.
-S Precision Breaker
The -S geometry is optimized for finishing passes. It creates stable chip breaking at lower depths of cut, ensuring the workpiece surface remains pristine and free of scratches.
Superior Surface Gloss
The cermet substrate allows for higher cutting speeds while maintaining dimensional accuracy, often eliminating the need for secondary grinding or polishing.
Decoding SNMG120408R-S Technical Nomenclature
S
Square
N
0° Relief
M
Tolerance
G
Hole/Fix
12
12.7mm Size
04
4.76mm Thick
08
0.8mm Rad.
R-S
Right/Breaker
3. Technical Specifications: Metric vs. Imperial
| Parameter |
Metric (ISO) |
Imperial Equivalent |
| Inscribed Circle (IC) |
12.7 mm |
1/2" (SNMG 432R) |
| Thickness (S) |
4.76 mm |
3/16" |
| Corner Radius (RE) |
0.8 mm |
1/32" |
| Grade Compatibility |
NS9530 (Cermet) |
High Speed Steel Finishing |
Recommended Cutting Parameters (NS9530 Grade)
-
Cutting Speed (Vc): 120 - 280 m/min (Ideally 220 m/min for alloy steel)
-
Feed Rate (f): 0.10 - 0.35 mm/rev
-
Depth of Cut (ap): 0.5 - 2.0 mm
*Note: Cermet grades are more brittle than carbide. For best results, use a rigid machine setup and avoid interrupted cuts.*
4. Product Applications
- Precision turning of automotive drive shafts.
- Mirror-finish machining for hardware and architectural steel.
- Final finishing passes for carbon and low-alloy steels.
- High-volume B2B component production requiring gloss finish.
5. Tool Compatibility
Compatible with Standard ISO Right-Hand Turning Holders (External: DSBNR, PSSNR, PSKNR; Internal: S...-PSSNR). Fits all SNMG 1204 pocket designs.
7. Why Choose CNCHome-Beyond?
Genuine Tungaloy
100% Original Japanese Import
CNC Expertise
B2B Professional Support
Fast Global Shipping
Secure B2B Logistics
Stock Availability
Bulk Inventory Ready
What Global Machinists Are Saying
⭐⭐⭐⭐⭐ "Mirror Finish Success!" - David K., USA
"We swapped from standard carbide to this cermet for the final pass on our alloy steel parts. The gloss is unbelievable—we saved so much time by skipping the polishing stage."
⭐⭐⭐⭐⭐ "Exceptional Surface Quality" - M. Berger, Germany
"Authentic Tungaloy quality. The -S breaker handles long chips perfectly on our finishing passes. Extremely happy with the tool life."
⭐⭐⭐⭐ "Very Stable" - T. Yamamoto, Japan
"Consistent performance across all our CNC lathes. No built-up edge even after hours of continuous turning."
⭐⭐⭐⭐⭐ "Reliable B2B Partner" - Lee W., Singapore
"Fast shipping and genuine parts. The technical details provided in the listing helped our engineers set the feed rates perfectly."
⭐⭐⭐⭐⭐ "Perfect for Alloy Steel" - A. Rossi, Italy
"If you need high precision and a beautiful look on steel parts, NS9530 is the only grade to use."
8. FAQ - Professional Support
Q: Is cermet better than carbide for steel turning?
A: Cermet (NS9530) is superior for finishing because it doesn't "weld" to the steel, creating a shinier finish. However, carbide (T9125/T9225) is tougher for roughing.
Q: Does this fit SNMG 432R holders?
A: Yes, SNMG 120408 is the metric standard for the Imperial SNMG 432 size. They are fully compatible with 1/2" IC tool holders.
Q: What happens if I use this R-hand insert in a left-hand holder?
A: The chipbreaker orientation will be incorrect, leading to chip nesting and poor surface finish. Always match the hand of the insert to the tool holder.
Expert Machinist Tip: Cermet vs. Carbide Choice
For roughing passes where you need to remove material fast, stick with **Carbide (T9125)**. For the final 0.5mm finish pass, switch to **Cermet (NS9530)**. This combination gives you the best tool life and a part that looks like it was ground to a mirror. Trust **Tungaloy Japan** for your precision spindle operations.
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