Mitsubishi CNMG120404-MS UE6020 Steel Finishing Insert (10pcs)
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CNMG120404-MS UE6020
Steel Finishing Specialist | UE6020 Tough CVD | MS Precision Geometry
Precision Performance for Steel Applications
UE6020 Grade (The Versatile Toughness): The UE6020 is a specialized CVD-coated grade optimized for P-Class (Steel). It provides an excellent balance of wear resistance and fracture toughness. This grade is particularly effective in general turning where the machine setup may not be perfectly rigid, or when encountering light interruptions in the cut.
MS Chipbreaker (The Sharp Edge): The MS geometry is a high-sharpness chipbreaker designed specifically for finishing. It features a positive rake angle that reduces cutting forces and minimizes heat generation at the tip. This is critical for maintaining dimensional accuracy and achieving a superior surface finish on soft and medium-carbon steels.
0.4mm (1/64") Precision Radius: The small corner radius is the secret to high-precision work. It reduces radial cutting pressure, which prevents vibration (chatter) on slender workpieces or thin-walled tubes, allowing for exceptionally clean finishes.
Metric vs. Imperial Comparison
| System | Model Designation | I.C. (Inscribed Circle) | Thickness | Radius (RE) |
|---|---|---|---|---|
| Metric | CNMG120404-MS | 12.7 mm | 4.76 mm | 0.40 mm |
| Imperial | CNMG431-MS | 1/2" | 3/16" | 0.0157" (1/64") |
Recommended Cutting Parameters
*Optimized for finishing. Use coolant to maximize surface quality and prolong PVD/CVD life.
| Workpiece Material | Speed (Vc) | Feed (fn) | Depth (Ap) |
|---|---|---|---|
| Carbon Steel (1045) | 180 - 320 m/min | 0.05 - 0.20 mm/r | 0.20 - 1.50 mm |
| Alloy Steel (4140) | 150 - 280 m/min | 0.08 - 0.18 mm/r | 0.20 - 1.20 mm |
Recommended Tool Holders
Ensure high precision with DCLNR/L 12 series external holders:
Shop DCLNR 12 HoldersPro-Tip: UE6020 vs. MC6015
UE6020 (The Tough One): Use this grade for general-purpose steel machining. It is more forgiving than MC6015 and better for older machines or less stable setups.
MS vs. MA Chipbreaker: Always choose MS for final finishing where depth of cut is shallow. If you need to do light roughing or medium cutting, the MA chipbreaker is a better fit.
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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.