Mitsubishi SNMG120408-MA UC5115 Turning Insert | Cast Iron Specialist
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SNMG120408-MA UC5115
Mitsubishi Materials | The Industry Standard for Cast Iron Turning
The Mitsubishi SNMG120408-MA UC5115 is a premium indexable carbide insert engineered specifically for the high-efficiency machining of cast iron. Featuring the specialized UC5115 CVD coating, this insert provides an industry-leading balance of toughness and wear resistance. It is the primary recommendation for ISO K-class materials, including gray cast iron and ductile iron, delivering stable tool life in both continuous and slightly interrupted CNC turning operations.
Packaging: Genuine Mitsubishi Box of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Hole/Double Sided
12.7mm Size
4.76mm Thick
0.8mm Radius
Chipbreaker
Technical Specifications
| Feature | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120408-MA | SNMG 432-MA |
| Inscribed Circle ($IC$) | 12.7 mm | 0.500" (1/2") |
| Thickness ($S$) | 4.76 mm | 0.187" (3/16") |
| Corner Radius ($RE$) | 0.8 mm | 0.031" (1/32") |
UC5115 Carbide Grade
The UC5115 grade features Mitsubishi's "All-Black Super-Even Coat." This advanced CVD coating (TiCN + Al2O3) is specifically tuned for the thermal and mechanical demands of cast iron turning. It significantly suppresses flank wear and cratering, allowing for high-speed machining while maintaining exceptional fracture resistance in ductile iron.
MA Medium Chipbreaker
The MA chipbreaker is a double-sided, flat-top geometry optimized for medium cutting. It features a positive land that ensures a sharp cutting action, reducing cutting forces and vibration. This geometry is ideal for general-purpose turning, providing excellent chip control over a wide range of feed rates in both steel and cast iron.
Recommended Cutting Parameters
Optimized for UC5115 Cast Iron Grade
| Workpiece Material | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 350 m/min | 0.15 - 0.45 mm/rev | 1.0 - 4.0 mm |
| Ductile Cast Iron (FCD) | 120 - 250 m/min | 0.15 - 0.40 mm/rev | 1.0 - 3.5 mm |
COMPATIBLE TOOLING
Specifically designed for use with standard PSSNR/L, DSBNR/L, or MSKNR/L turning holders.
View Matching Tool 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.