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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