Mitsubishi SNMA120408 UC5105 Turning Insert | Cast Iron Specialist
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SNMA120408 UC5105
Mitsubishi Materials | High-Speed Cast Iron Turning Specialist
The Mitsubishi SNMA120408 UC5105 is a high-performance indexable turning insert specifically engineered for the high-speed machining of cast iron. Utilizing the UC5105 CVD coating, this insert is the benchmark for gray cast iron (FC) and ductile iron (FCD). Featuring a flat-top geometry (no chipbreaker), it provides maximum edge strength for heavy-duty roughing and continuous cutting, ensuring long-term wear resistance and dimensional stability in high-volume CNC turning.
Packaging: Original Mitsubishi Box of 10 Inserts
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Fixing Hole
12.7mm Size
4.76mm Thick
0.8mm Radius
Technical Specifications
| Feature | Metric Designation | Inch (ANSI) Designation |
|---|---|---|
| Model Name | SNMA120408 | SNMA 432 |
| 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") |
UC5105 Grade Breakdown
The UC5105 grade is Mitsubishi's premium CVD coated carbide optimized for ISO K05-K15 applications. It features a thick, heat-resistant Al2O3 layer and a specialized TiCN layer that resists plastic deformation even at ultra-high cutting speeds. This makes it perfect for high-speed machining of gray cast iron without sacrificing tool life.
SNMA Flat-Top Geometry
The SNMA geometry signifies a flat-top insert without a chipbreaker groove. This design is preferred for turning cast iron where the chips are naturally short and brittle. By removing the chipbreaker, the edge strength is significantly increased, making it the ideal choice for heavy roughing cuts or interrupted machining on abrasive casting surfaces.
Recommended Cutting Parameters
Optimized for Cast Iron Turning (UC5105)
| Workpiece Material | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 200 - 600 m/min | 0.15 - 0.50 mm/rev | 1.0 - 5.0 mm |
| Ductile Cast Iron (FCD) | 150 - 400 m/min | 0.15 - 0.40 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.