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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