Mitsubishi SCMT120404 UC5115 Carbide Insert | Genuine MMC Japan
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SCMT120404 UC5115
Mitsubishi Materials | The Cast Iron Turning Specialist (CVD Coated)
The Mitsubishi SCMT120404 UC5115 is a high-performance CVD coated carbide insert engineered specifically for the demanding environment of cast iron turning. Utilizing the advanced UC5115 grade, this insert offers unparalleled wear resistance and thermal stability during high-speed continuous cutting. With its square 90° geometry and 7° relief angle, it is optimized for precision machining on CNC lathes, ensuring extended tool life in abrasive materials like grey and nodular cast iron.
ISO Designation Decoded
Square 90°
7° Relief Angle
M-Class Tolerance
Countersink Hole
12.7mm Size
4.76mm Thick
0.4mm Radius
Technical Specifications
| ANSI Designation | SCMT 431 |
|---|---|
| Grade Category | UC5115 (Flat CVD Al2O3/TiCN) |
| Inscribed Circle ($IC$) | 12.7 mm (1/2") |
| Thickness ($S$) | 4.76 mm (3/16") |
| Corner Radius ($R_e$) | 0.4 mm (1/64") |
UC5115 CVD Grade
The UC5115 grade is a specialized CVD (Chemical Vapor Deposition) coating optimized for K-class materials. It features a thick Al2O3 layer that acts as a thermal barrier, protecting the carbide substrate from the intense heat generated during cast iron turning. This coating significantly reduces crater wear and flank wear, even during high-velocity indexable turning.
Universal Geometry
As an S-Type (Square) insert with a 90° angle, it provides excellent edge strength. The 04 (0.4mm) radius is ideal for finishing to semi-finishing operations where surface finish and dimensional accuracy are the priority. The positive relief angle helps reduce cutting resistance, preventing vibration in lighter CNC turning setups.
Recommended Cutting Parameters
Specialized for Cast Iron (K10 - K20)
| Material Type | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Grey Cast Iron (FC) | 150 - 350 m/min | 0.10 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Ductile Cast Iron (FCD) | 120 - 280 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
LATHE TOOL HOLDER COMPATIBILITY
The SCMT1204 is designed for Mitsubishi SSDCN or SSBCR/L external turning holders and large diameter boring bars.
View Compatible Holders →
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.