Mitsubishi SNMG120412 UC5115 Turning Insert | Cast Iron Specialist
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SNMG120412 UC5115
Mitsubishi Materials | Heavy-Duty Roughing & Interrupted Cutting for Cast Iron
The Mitsubishi SNMG120412 UC5115 is a high-toughness indexable turning insert engineered for the most demanding cast iron turning applications. Featuring a reinforced 1.2mm corner radius and the specialized UC5115 CVD coating, this insert excels in heavy-duty roughing and interrupted cutting of gray and ductile iron. It is the industry standard for maintaining dimensional stability when machining components with casting scale or sand inclusions.
Packaging: Original Mitsubishi Materials Box of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Double Sided
12.7mm Size
4.76mm Thick
1.2mm Radius
Technical Specifications
| Feature | Metric (ISO) | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG120412 | SNMG 433 |
| Inscribed Circle ($IC$) | 12.7 mm | 0.500" (1/2") |
| Thickness ($S$) | 4.76 mm | 0.187" (3/16") |
| Corner Radius ($RE$) | 1.2 mm | 0.047" (3/64") |
UC5115 CVD Grade
The UC5115 grade is a specialized CVD-coated carbide designed for ISO K15-K25 applications. It features a thick, heat-resistant Al2O3 layer and a specialized TiCN layer that significantly improves edge security. This material is the preferred choice for interrupted turning of ductile iron, where mechanical shock and thermal cracking are major causes of tool failure.
MA Heavy-Roughing Geometry
The SNMG geometry offers 8 cutting edges for maximum efficiency. The 1.2mm radius provides exceptional strength for high-feed turning. Mitsubishi's MA chipbreaker (or standard roughing geometry) is designed for medium to heavy depths of cut, ensuring excellent chip control and reducing the heat transferred to the workpiece in CNC lathe operations.
Recommended Cutting Parameters
Optimized for Cast Iron Roughing (UC5115)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 350 m/min | 0.25 - 0.60 mm/rev | 1.5 - 5.0 mm |
| Ductile Cast Iron (FCD) | 120 - 250 m/min | 0.20 - 0.50 mm/rev | 1.5 - 4.0 mm |
TOOL HOLDER COMPATIBILITY
Pairs with standard PSSNR/L, DSBNR/L, or MSKNR/L 90° turning tool holders.
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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.