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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