Mitsubishi CNMG120412-GH UE6020 Heavy-Duty Steel Roughing Insert (10pcs)
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CNMG120412-GH UE6020
The Roughing Specialist | 1.2mm Reinforced Edge | UE6020 Impact CVD
Engineered for Maximum Material Removal
UE6020 Grade (The Tough CVD Armor): The UE6020 is Mitsubishi's premium CVD-coated grade for P-Class (Steel). It is designed for reliability in unstable conditions. With a thick coating that acts as a thermal and mechanical barrier, it prevents the cracks and chipping often caused by the high heat and heavy vibrations of large-scale roughing.
GH Chipbreaker (Heavy-Duty Geometry): The GH chipbreaker is designed for high-feed roughing. It features a robust, negative rake "T-land" at the cutting edge. This reinforcement allows the insert to withstand massive cutting forces while ensuring that chips are broken into small, safe "6-shapes," even when taking deep cuts ($A_p$).
1.2mm (3/64") Edge Radius: The 12-radius is the powerhouse of the CNMG line. It provides significant edge strength, allowing you to push the feed rate ($f_n$) significantly higher than a 0.8mm radius, resulting in shorter cycle times and increased tool life in roughing.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120412-GH | 12.7 mm | 4.76 mm | 1.20 mm |
| Imperial | CNMG433-GH | 1/2" | 3/16" | 0.0472" (3/64") |
Heavy Roughing Parameters
*The GH geometry requires a minimum feed to activate chip control. It is optimized for high-productivity removal rates.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (AISI 1045) | 120 - 240 m/min | 0.30 - 0.65 mm/r | 2.00 - 6.00 mm |
| Alloy Steel (AISI 4140) | 100 - 190 m/min | 0.25 - 0.50 mm/r | 1.50 - 4.50 mm |
Compatible Tool Holders
Ensure maximum rigidity with DCLNR/L 12 and MCLNR/L 12 series holders:
Shop DCLNR 12 HoldersPro-Tip: UE6020 vs. MC6025
UE6020 (The Impact Specialist): Choose this for roughing castings or parts with heavy interruptions. Its safety factor against breakage is the highest in the Mitsubishi lineup.
MC6025 (The CNC All-Rounder): Choose MC6025 if you have a very rigid setup and want to increase cutting speeds for higher throughput in stable steel turning.
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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.