Mitsubishi CNMG120408-MJ VP05RT PVD Insert for Super Alloys (10pcs)
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CNMG120408-MJ VP05RT
Super Alloy Specialist | VP05RT High-Hardness PVD | MJ Balanced Geometry
Engineered for High-Speed Excellence in Tough Materials
VP05RT Grade (High-Hardness Miracle PVD): The VP05RT is the high-wear-resistance variant of Mitsubishi’s legendary "Miracle" PVD series. It features a dense, heat-resistant coating on a high-hardness substrate. This grade is specifically designed to withstand the extreme temperatures generated when machining S-Class (Heat Resistant Super Alloys) and hardened steels. It maintains its edge sharpness even under the abrasive wear of Nickel-based alloys.
MJ Chipbreaker (The Versatile Stabilizer): The MJ geometry is a medium-duty breaker that excels in difficult-to-cut materials. It features a unique rake angle that reduces cutting forces to prevent work-hardening—a common issue in stainless and titanium. The MJ design provides excellent chip control across semi-roughing to semi-finishing operations.
0.8mm (1/32") Universal Radius: The 08 radius provides a reinforced tip that handles heat better than smaller radii, making it the ideal choice for medium roughing passes where tool life and surface integrity are paramount.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120408-MJ | 12.7 mm | 4.76 mm | 0.80 mm |
| Imperial | CNMG432-MJ | 1/2" | 3/16" | 0.0315" (1/32") |
Recommended Cutting Parameters
*VP05RT is built for speed. Lowering speed too much in HRSA can lead to edge built-up. Use abundant high-pressure coolant.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Inconel 718 / Rene 41 | 40 - 85 m/min | 0.15 - 0.35 mm/r | 0.80 - 3.50 mm |
| Hardened Steel (45-55 HRC) | 70 - 150 m/min | 0.10 - 0.30 mm/r | 0.50 - 2.50 mm |
Compatible Tool Holders
Maximum clamping rigidity is required for MJ series performance. Fits DCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: VP05RT vs. VP10RT
VP05RT (The Speed Star): Choose this grade when surface speed is high and you are experiencing excessive flank or crater wear. It offers the highest hardness in the Miracle PVD family.
VP10RT (The Versatile Toughness): Switch to VP10RT if your primary failure mode is edge chipping or if you are dealing with significant vibrations or interrupted cuts.
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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.