Mitsubishi CNMA120412 MC5015 Flat-Top Carbide Insert for Cast Iron
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CNMA120412 MC5015
Nano-Texture Roughing Master | 1.2mm Heavy Radius | Flat-Top Rigidity
Structural Integrity for High MRR
MC5015 Grade (Nano-Texture CVD): MC5015 is the next generation of K-Class (Cast Iron) machining. It features a Nano-textured Alumina coating that provides superior crystal grain alignment. This creates an incredibly hard surface that resists the severe abrasive wear caused by high-speed contact with graphite and sand inclusions in gray iron.
CNMA Flat-Top (Reinforced Edge): The CNMA geometry is a "Flat-Top" design with no chipbreaker. In cast iron, which naturally produces short, crumbly chips, a chipbreaker only serves to weaken the cutting edge. The CNMA design ensures the maximum volume of carbide is directly behind the cut, allowing for heavy roughing without the risk of edge collapse.
1.2mm Heavy-Duty Radius: The 12 (3/64") radius is the strongest corner available in the CNMA series. It distributes cutting pressure and heat across a wider area, enabling high feed rates ($f_n$) and providing the toughness needed to cut through rough casting skin.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMA120412 | 12.7 mm | 4.76 mm | 1.20 mm |
| Imperial | CNMA433 | 1/2" | 3/16" | 0.0472" (3/64") |
Heavy Roughing Parameters
*The 1.2mm radius allows for aggressive feeding. Use higher speeds for gray iron and reduce speed for ductile iron.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Cast Iron (Class 40) | 250 - 600 m/min | 0.25 - 0.60 mm/r | 1.20 - 5.00 mm |
| Ductile Iron (D700) | 180 - 400 m/min | 0.20 - 0.50 mm/r | 1.00 - 4.00 mm |
Heavy-Duty Tool Holders
Maximum performance with DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: When to Choose MC5015
MC5015: Choose this for the highest possible speed in stable, high-production gray iron turning. The Nano-CVD coating thrives in heat.
UC5115: Switch to UC5115 if you are dealing with very heavy interrupted cuts or extremely unstable setups, as it offers slightly more edge toughness at the expense of top-end speed.
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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.