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") |
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This Mitsubishi insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.