Mitsubishi CNMG120408-RP MC6025 Roughing Steel Turning Insert (10pcs)
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CNMG120408-RP MC6025
The Roughing Specialist | MC6025 Impact Toughness | RP Heavy-Duty Edge
Built for Maximum Metal Removal Rates (MRR)
MC6025 Grade (The Impact Shield): The MC6025 is Mitsubishi's premier "all-rounder" for steel, but it truly shines in roughing. Utilizing Nano-Texture Technology, the CVD coating provides a dense, uniform layer of Al2O3 that resists crater wear while the specialized substrate prevents edge fracture during heavy interrupted cuts or when machining through rough forging skins.
RP Chipbreaker (Roughing-Positive Power): The RP geometry is designed for the most demanding applications. It features a reinforced cutting edge and a wide chip pocket that can handle massive chip volumes without clogging. If you are taking deep cuts or running high feed rates in carbon or alloy steels, the RP breaker ensures the insert remains stable under extreme pressure.
0.8mm (1/32") Edge Strength: The 08 radius is the perfect balance for roughing. It offers superior edge strength compared to 04 radii, allowing it to withstand the high radial forces associated with heavy depth-of-cut (Ap) passes.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-RP | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-RP | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Roughing Parameters
*The RP breaker thrives at higher feed rates. Avoid very light finishing passes as chip control may decrease.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Low Carbon Steel (1018) | 200 - 380 m/min | 0.25 - 0.60 mm/r | 1.50 - 5.00 mm |
| Alloy Steel (4140/8620) | 150 - 300 m/min | 0.20 - 0.50 mm/r | 1.20 - 4.00 mm |
Compatible Tool Holders
Ensure absolute stability for roughing with PCLNR/L 12 or DCLNR/L 12 holders:
Shop PCLNR 12 HoldersPro-Tip: MC6025 vs. MC6015 for Roughing
MC6025 (The Tough Rougher): Best for general roughing and when the machine is not perfectly rigid or the cut is interrupted.
MC6015 (The High-Speed Finisher): Switch to MC6015 only for high-speed continuous roughing on clean material where wear resistance is more important than impact strength.
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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.