Mitsubishi SNMG190612 UC5115 Turning Insert | Cast Iron Heavy Turning
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SNMG190612 UC5115
Mitsubishi Materials | Heavy-Duty Cast Iron Machining Specialist
The Mitsubishi SNMG190612 UC5115 is a powerhouse indexable turning insert specifically designed for large-scale cast iron turning. Built on a robust 19mm substrate, this insert is the go-to solution for heavy-duty roughing and interrupted cutting. The UC5115 CVD grade provides an industry-leading balance of toughness and wear resistance, making it highly effective for machining Gray Cast Iron (FC) and Ductile Cast Iron (FCD) in high-torque CNC applications.
Condition: 100% Genuine Mitsubishi | Box of 10
ISO Designation Decoded
Square 90°
0° Relief
M-Class Tol.
Double Sided
19.05mm Size
6.35mm Thick
1.2mm Radius
Technical Specifications
| Specification | Metric Designation | Inch (ANSI) Equivalent |
|---|---|---|
| Model Name | SNMG190612 | SNMG 643 |
| Inscribed Circle ($IC$) | 19.05 mm | 0.750" (3/4") |
| Thickness ($S$) | 6.35 mm | 0.250" (1/4") |
| Corner Radius ($RE$) | 1.2 mm | 0.047" (3/64") |
UC5115 Grade Advantage
The UC5115 grade features Mitsubishi's "All-Black Super-Even Coat" (CVD TiCN + Al2O3). This thick, fibrous coating provides a superior thermal barrier, protecting the substrate from the high heat generated during high-speed cast iron turning. It is particularly effective at preventing flank wear and thermal cracking, even during unstable cutting conditions.
Medium to Heavy Geometry
With its large 19mm size, this SNMG geometry is designed for high metal removal rates (MRR). The 1.2mm radius offers high cutting edge strength, making it the perfect choice for roughing large castings. The integrated chipbreaker provides stable chip control across a wide range of feed rates, preventing chip re-cutting on the workpiece surface.
Recommended Cutting Parameters
Starting Values for Cast Iron (UC5115)
| Material Group | Cutting Speed ($v_c$) | Feed Rate ($f$) | Depth of Cut ($a_p$) |
|---|---|---|---|
| Gray Cast Iron (FC) | 150 - 350 m/min | 0.30 - 0.70 mm/rev | 2.0 - 6.0 mm |
| Ductile Cast Iron (FCD) | 120 - 280 m/min | 0.25 - 0.60 mm/rev | 2.0 - 5.0 mm |
MAXIMIZE TOOL RIGIDITY
Optimized for use with heavy-duty PSSNR/L or MSKNR/L 90° turning tool holders with 19mm pockets.
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