Mitsubishi CNMG120412-RK MC5015 Cast Iron Roughing Insert (10pcs)
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CNMG120412-RK MC5015
Cast Iron Roughing Beast | MC5015 Abrasive Barrier | RK Heavy-Duty Edge
Engineered for High Metal Removal in Cast Iron
MC5015 Grade (The Abrasive Shield): Cast iron is highly abrasive due to its graphite structure. The MC5015 is a premium CVD-coated grade featuring a thick Alumina ($Al_2O_3$) layer. This nano-layered coating acts as a thermal shield and a wear barrier, allowing for high cutting speeds without the rapid flank wear that destroys standard inserts.
RK Chipbreaker (Roughing-K Class): The RK geometry is designed for "Process Security." It features a wide land and a robust cutting edge designed to absorb the impact of scale, crust, and interruptions. Unlike finishing breakers, the RK focus is on Edge Toughness, ensuring the insert doesn't chip when taking deep cuts on raw castings.
1.2mm (3/64") Heavy-Duty Radius: The large 12 radius is the secret to this tool's lifespan. It provides a massive heat sink at the corner and significantly increases the strength of the insert tip, making it ideal for high feed rates and heavy depths of cut.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120412-RK | 12.7 mm | 4.76 mm | 1.20 mm |
| Imperial | CNMG433-RK | 1/2" | 3/16" | 0.0472" (3/64") |
Heavy Roughing Parameters
*The 1.2mm radius thrives at higher feed rates. For Gray Iron, dry machining is often preferred to maximize coating life.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Gray Iron (Class 35/FC250) | 200 - 450 m/min | 0.25 - 0.60 mm/r | 2.00 - 6.00 mm |
| Ductile Iron (65-45-12) | 150 - 300 m/min | 0.20 - 0.50 mm/r | 1.50 - 4.50 mm |
Rigid Tool Holders
Due to high radial forces, use PCLNR/L 12 or DCLNR/L 12 series holders:
Shop Heavy-Duty HoldersPro-Tip: MC5015 vs. MC5005
MC5015 (The Rougher): Best for interrupted cuts, castings with skin, and Ductile Iron where toughness is required.
MC5005 (The High-Speed Expert): Switch to MC5005 for high-speed continuous turning in Gray Iron with perfect stability to achieve maximum tool life.
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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.