Mitsubishi SCMT120404 NX2525 Cermet Insert | MMC Japan Genuine
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SCMT120404 NX2525
Mitsubishi Materials | The Mirror-Finish Cermet Specialist
The Mitsubishi SCMT120404 NX2525 is a high-grade cermet turning insert designed specifically for the final stages of CNC turning. While standard carbide is the workhorse for roughing, the NX2525 cermet grade is the master of the surface finish. With its 7° positive relief angle and precision-honed 0.4mm nose radius, it minimizes friction and prevents built-up edge, delivering a high-gloss, dimensionally accurate result on carbon and alloy steels.
Technical Specifications
| ISO Designation | SCMT120404 |
|---|---|
| ANSI Designation | SCMT 431 |
| Grade Category | NX2525 (Uncoated Cermet) |
| Inscribed Circle ($IC$) | 12.7 mm (1/2") |
| Thickness ($S$) | 4.76 mm (3/16") |
| Corner Radius ($R_e$) | 0.4 mm (1/64") |
NX2525 Cermet Grade
NX2525 is a premium micro-grain cermet (Ceramic-Metal composite). Its primary advantage in precision machining is its low chemical affinity with steel. This means the workpiece material doesn't stick to the edge even at high temperatures, effectively eliminating crater wear and maintaining sharp cutting edges for significantly longer production runs compared to standard PVD carbide.
Positive Finishing Geometry
The S-type square shape with 7° clearance is optimized for indexable turning holders. The 04 (0.4mm) radius is specifically tailored for light finishing passes. It reduces cutting resistance and radial pressure, which is vital for maintaining tight tolerances on long or slender workpieces where vibration could compromise the finish.
Recommended Cutting Parameters
Primary Material: Steel Finishing (P05 - P20)
| Workpiece Material | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Low Carbon Steel | 180 - 350 m/min | 0.05 - 0.20 mm/rev | 0.2 - 1.5 mm |
| Alloy Steel (4140/8620) | 140 - 280 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.0 mm |
HOLDER COMPATIBILITY
The SCMT120404 fits standard Mitsubishi SSBCR/L or SSDCN holders and internal boring bars.
Browse S-Type Holders →Metric vs. Inch Cross-Reference
| Feature | Metric (ISO) | Inch (ANSI) |
|---|---|---|
| Insert Size | 12 (12.7 mm IC) | 4 (1/2" IC) |
| Thickness | 04 (4.76 mm) | 3 (3/16") |
| Nose Radius | 04 (0.4 mm) | 1 (1/64") |
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.