Mitsubishi CNMG120408 UC5115 CVD Carbide Turning Insert for Cast Iron (10pcs)
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CNMG120408 UC5115
Universal Cast Iron Specialist | UC5115 CVD Grade | 0.8mm Standard Radius
High-Performance Material Science
UC5115 Grade (CVD Coating Technology): UC5115 is Mitsubishi’s premier grade for K-Class (Cast Iron) turning. It utilizes a thick, highly-oriented Alumina (Al2O3) coating that serves as a superior thermal barrier. This prevents the heat generated by abrasive graphite particles from reaching the carbide substrate, dramatically increasing tool life in both Gray Iron (FC) and Ductile Iron (FCD).
CNMG Geometry & Chipbreaker: The CNMG geometry is a double-sided, 80-degree diamond shape that offers four cutting edges. The integrated chipbreaker is designed for General Purpose machining, ensuring stable chip evacuation even in ductile iron where chips tend to be slightly stringier compared to the crumbly chips of gray iron.
0.8mm (1/32") Balanced Radius: The 08 radius is the global industry standard. It is strong enough to resist chipping during light interrupted cuts while providing a high-quality surface finish (Ra) that often eliminates the need for a secondary finishing operation.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408 | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432 | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*Optimized for high-productivity turning. Dry cutting is recommended for UC5115 unless surface cracking occurs.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (FC250) | 180 - 450 m/min | 0.15 - 0.45 mm/r | 0.80 - 4.50 mm |
| Ductile Iron (FCD600) | 130 - 320 m/min | 0.15 - 0.40 mm/r | 0.80 - 3.50 mm |
Required Tool Holders
Maximum performance with DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: Choosing between UC5115 and MC5015
UC5115 (The All-Rounder): Excellent for general use across all cast irons. It handles light interruptions and varying casting quality with ease.
MC5015 (The Speed Demon): If you have a highly stable setup and are turning clean gray iron at ultra-high speeds, MC5015 offers higher wear resistance but lower shock resistance.
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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.