Mitsubishi SNMA120412 MC5015 Turning Insert | Cast Iron Specialist
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SNMA120412 MC5015
Mitsubishi Materials | The Productivity Benchmark for Cast Iron Turning
The Mitsubishi SNMA120412 MC5015 is a high-performance indexable turning insert specifically engineered for high-efficiency machining of cast iron. Utilizing the MC5015 CVD coating, this insert excels in high-speed turning of gray cast iron (FC) and ductile iron (FCD). The SNMA flat-top geometry is designed without a chipbreaker to provide maximum edge strength, making it the premier choice for heavy-duty roughing where tool life and fracture resistance are critical.
Packaging: Genuine Mitsubishi Box of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Top Hole
12.7mm Size
4.76mm Thick
1.2mm Radius
Technical Specifications
| Feature | Metric Designation | Inch (ANSI) Designation |
|---|---|---|
| Model Name | SNMA120412 | SNMA 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") |
MC5015 Grade Technology
The MC5015 grade is a specialized CVD coated carbide developed by MMC Mitsubishi specifically for the ISO K15 application range. It features a Nano-texture coating technology that offers exceptional thermal stability. This allows the insert to resist crater wear and plastic deformation during high-speed CNC turning, making it the ideal partner for high-volume automotive casting production.
SNMA Flat-Top Edge
The SNMA profile features a flat-top geometry (no chipbreaker groove). In cast iron machining, where chips are naturally short and abrasive, a chipbreaker is often unnecessary. By utilizing a flat-top design, the insert maximizes the cross-sectional strength of the cutting edge, effectively preventing chipping and fracture during interrupted cuts or heavy scaling on the workpiece surface.
Recommended Cutting Parameters
Optimized for Gray and Ductile Cast Iron (MC5015)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 450 m/min | 0.15 - 0.60 mm/rev | 1.0 - 5.0 mm |
| Ductile Iron (FCD) | 120 - 300 m/min | 0.15 - 0.50 mm/rev | 1.0 - 4.0 mm |
TOOL HOLDER COMPATIBILITY
Compatible with all standard PSSNR/L or DSBNR/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.