Mitsubishi CNMG190612-MA UE6020 Heavy Duty Steel Turning Insert (10pcs)
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CNMG190612-MA UE6020
The Steel Roughing Titan | UE6020 CVD Grade | Large-Scale Heavy Machining
Built for Maximum Metal Removal Rates (MRR)
UE6020 Grade (CVD Mastery): The UE6020 is Mitsubishi’s premier CVD-coated grade for P-Class (Steel). In large-scale roughing, heat management is critical. The thick Alumina layer provides a superior thermal barrier, preventing plastic deformation of the carbide substrate during long, aggressive cuts in carbon, alloy, and tool steels.
MA Chipbreaker (Heavy-Medium Duty): The MA geometry is optimized for medium-to-heavy turning. Its design balances a sharp shearing action to lower cutting forces with a reinforced land area that prevents edge chipping when encountering surface scale or rough-cast skins on large workpieces.
1.2mm (3/64") Radius Security: The 12 radius is the standard for heavy roughing. It offers the perfect trade-off between corner strength and radial cutting force, allowing for high feed rates while maintaining structural integrity during interrupted cuts.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG190612-MA | 19.05 mm | 6.35 mm | 1.20 mm |
| Imperial | CNMG643-MA | 3/4" | 1/4" | 0.0472" (3/64") |
Heavy-Duty Cutting Parameters
*Large diameter workpieces require stable RPM management. Use heavy flood coolant for best tool life.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045/S45C) | 140 - 320 m/min | 0.25 - 0.65 mm/r | 1.50 - 8.00 mm |
| Alloy Steel (4140/SCM440) | 110 - 260 m/min | 0.20 - 0.50 mm/r | 1.50 - 6.00 mm |
Heavy-Duty Tool Holders
Maximum performance for DCLNR/L 19 or MCLNR/L 19 series (3232 or 4040 shank sizes recommended):
Shop DCLNR 19 HoldersPro-Tip: When to upgrade to CNMG1906?
Stability is Key: If your CNMG1204 inserts are fracturing due to high cutting forces or heat saturation in large parts, the 1906 series offers 35% more thickness to dissipate heat and absorb vibration.
UE6020 vs. MC6025: UE6020 remains the benchmark for reliability in roughing. Use it when the material surface is unpredictable (forgings/castings). Switch to MC6025 only for clean, continuous bars at higher speeds.
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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.