Mitsubishi CNMG120404-MA UE6020 Carbide Insert for Steel Finishing (10pcs)
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CNMG120404-MA UE6020
Steel Finishing Specialist | UE6020 CVD Grade | Precision 0.4mm Radius
Optimized for Steel Precision
UE6020 Grade (CVD Coating): UE6020 is Mitsubishi’s premium CVD-coated grade optimized for P-Class (Steel) turning. It features a triple-layer coating (TiCN-Al2O3-TiN) that provides exceptional resistance to crater wear and plastic deformation. This grade is designed for stable, high-speed continuous turning where tool life consistency is paramount.
MA Chipbreaker (Finishing to Medium Cut): The MA geometry is engineered with a specialized chip-curling ridge. It excels at breaking chips at shallow depths of cut, which is critical during finishing passes to prevent surface scratching and "bird-nesting" on the workpiece.
0.4mm (1/64") Precision Radius: The 04 radius is the professional's choice for reducing cutting resistance. By minimizing the contact area between the tool and the part, it significantly reduces the risk of chatter in long-overhang boring or thin-walled turning.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404-MA | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431-MA | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Optimized for finishing. High speeds (Vc) are necessary to maximize the benefits of the CVD coating.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045 / S45C) | 180 - 350 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Alloy Steel (4140 / SCM440) | 150 - 300 m/min | 0.08 - 0.18 mm/r | 0.20 - 1.20 mm |
Required Tool Holders
Maximum clamping stability for DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UE6020 vs. VP15TF
UE6020 (Steel Master): Best for continuous steel turning at high speeds. The thick CVD coating offers superior tool life in dry or high-heat environments.
VP15TF (The Generalist): Choose VP15TF for interrupted cuts, stainless steel, or when you are alternating between multiple material types in small batches.
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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.