Mitsubishi CNMA120404 UC5105 CVD Carbide Turning Insert for Cast Iron (10pcs)
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CNMA120404 UC5105
High-Speed Gray Iron Specialist | Flat-Top Rigidity | 0.4mm Precision
UC5105 Grade & CNMA Geometry
UC5105 Grade (Ultra-Hard CVD): This is the premium choice for Gray Cast Iron (K05-K15). The UC5105 features a specialized multi-layer CVD coating with a highly oriented alumina layer. It is engineered for maximum hardness and crater wear resistance, allowing CNC machines to run at significantly higher surface speeds (Vc) without edge deformation.
CNMA Flat-Top (Non-Chipbreaker): The CNMA geometry is designed for materials that produce short, crumbly chips like cast iron. By eliminating the chipbreaker groove, the insert maintains a solid carbide cross-section. This provides the ultimate edge strength to resist the high-frequency vibrations and abrasive sand inclusions found in raw castings.
0.4mm Precision Radius: The 04 (1/64") radius reduces radial cutting forces, making it the ideal selection for semi-finishing passes or for use on older machines where minimizing vibration is essential.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMA120404 | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMA431 | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*UC5105 is a high-speed grade. It is not recommended for heavy interrupted cuts or low-speed applications.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (FC250-350) | 250 - 550 m/min | 0.10 - 0.35 mm/r | 0.50 - 4.00 mm |
| Ductile Iron (High-Speed Finishing) | 180 - 350 m/min | 0.08 - 0.25 mm/r | 0.50 - 3.00 mm |
Compatible Tool Holders
Optimized for DCLNR/L 12 and MCLNR/L 12 series Turning Tools:
Shop DCLNR 12 HoldersPro-Tip: UC5105 vs. UC5115
UC5105: The Wear Resistance Master. Choose this for the highest possible surface speeds in Gray Cast Iron. It excels in long, continuous cuts.
UC5115: The Toughness Specialist. If your casting has heavy interrupted cuts or "crusty" skin, switch to UC5115 to prevent micro-chipping of the cutting edge.
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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.