Mitsubishi SCMT120404 UE6020 Carbide Insert | MMC Japan Genuine
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SCMT120404 UE6020
Mitsubishi Materials | General Purpose Steel Machining Specialist
The Mitsubishi SCMT120404 UE6020 is a highly versatile indexable turning insert engineered for stable performance across a wide range of steel machining applications. Featuring the tough UE6020 CVD coating, this insert excels in both continuous and slightly interrupted CNC turning of carbon and alloy steels. Its 0.4mm nose radius provides precision for finishing while maintaining the structural integrity needed for medium-duty precision machining.
ISO Designation Decoded
Square 90°
7° Relief Angle
M-Class Tolerance
Countersink Hole
12.7mm Size
4.76mm Thick
0.4mm Radius
Technical Specifications
| Feature | Metric Designation | Inch (ANSI) Designation |
|---|---|---|
| Model Name | SCMT120404 | SCMT 431 |
| Inscribed Circle ($IC$) | 12.7 mm | 1/2" |
| Thickness ($S$) | 4.76 mm | 3/16" |
| Nose Radius ($R_e$) | 0.4 mm | 1/64" |
UE6020 Grade Strength
The UE6020 grade is a flagship CVD (Chemical Vapor Deposition) coating optimized for P-class materials. It features a robust multi-layer coating that balances wear resistance and fracture toughness. This makes it the first choice for general steel turning, providing stability even in unpredictable conditions or when machining parts with slight variations in hardness.
Precision Finishing Geometry
As an S-Type (Square) insert with a 90° angle, it provides a very strong edge. The 04 (0.4mm) radius is specifically designed for finishing work, helping to achieve tight tolerances and superior surface finish. The positive rake angle reduces cutting resistance, preventing workpiece deformation on thinner parts.
Recommended Cutting Parameters
General Steel Turning (P20 - P35)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Mild Steel / Low Carbon | 150 - 300 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Alloy Steel (4140/8620) | 120 - 250 m/min | 0.08 - 0.20 mm/rev | 0.3 - 2.0 mm |
LATHE TOOL HOLDER COMPATIBILITY
The SCMT1204 series is designed for Mitsubishi SSDCN or SSBCR/L external turning holders and large boring bars.
Find Your Tool Holder →
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.