Mitsubishi CNMA120408 UC5115 Flat-Top Carbide Insert for Cast Iron (10pcs)
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CNMA120408 UC5115
Universal Cast Iron Specialist | Flat-Top Geometry | UC5115 CVD Grade
Engineered for High-Abrasion Resistance
UC5115 Grade (The K-Class Legend): UC5115 is a high-performance CVD (Chemical Vapor Deposition) coated grade specifically developed for K-Class materials (Cast Iron). It features a thick, heat-resistant Alumina (Al2O3) layer that protects the substrate from the severe thermal loads generated during high-speed dry machining.
CNMA Flat-Top Design: The CNMA designation represents the "Non-Chipbreaker" flat-top geometry. Because cast iron chips naturally shatter into small segments, a chipbreaker groove is not only unnecessary but can act as a stress point. The flat-top design maximizes the carbide volume at the cutting edge, providing superior impact resistance against sand inclusions and rough casting skin.
0.8mm Versatile Radius: The 08 (1/32") corner radius is the global standard for semi-roughing to semi-finishing. It is robust enough to handle high feed rates while still delivering an excellent surface finish (Ra) on gray and ductile iron components.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMA120408 | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMA432 | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*Optimized for high-speed dry machining. Use flood coolant only if thermal cracking is not a concern.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (GG25) | 180 - 450 m/min | 0.15 - 0.45 mm/r | 0.80 - 4.50 mm |
| Ductile Cast Iron (GGG60) | 120 - 320 m/min | 0.12 - 0.40 mm/r | 0.80 - 4.00 mm |
Required Tool Holders
Maximum clamping stability for DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UC5115 vs. UC5105
UC5115 (The Versatile One): Use this as your primary grade. It handles everything from gray iron to the tougher nodular irons and can manage moderate interrupted cuts.
UC5105 (The High-Speed Specialist): Switch to UC5105 only for continuous, very high-speed turning of gray iron where wear resistance is the only priority and the setup is perfectly stable.
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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.