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.
Find 19mm Tool Holders →
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.