Korloy WNMG080404-HM NC3020 (WNMG 431-HM) CVD Coated Turning Insert (10pcs)
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The Original Korloy WNMG080404-HM NC3020 (ANSI: WNMG 431-HM) is the industry-standard 80° Trigon Turning Insert for general steel machining. Optimized for Finishing and Semi-Finishing, the 0.4mm (1/64") radius minimizes cutting pressure, making it ideal for maintaining tight tolerances on slender or thin-walled workpieces. The NC3020 CVD grade is specifically engineered to handle the high temperatures of high-speed CNC turning, providing a stable and predictable tool life.
The Global Standard: WNMG 0804 (ANSI 43) is the most versatile size in the turning world. With 6 precision edges and the high-speed NC3020 coating, this insert provides the lowest cost-per-edge for mass production of steel components.
Technical Specifications (ISO Metric vs. ANSI Inch):
| ISO Designation | WNMG 080404-HM |
| ANSI Designation | WNMG 431-HM |
| Insert Size (IC) | 12.7 mm / (1/2") |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | NC3020 (Premium CVD for Steel) |
| Chipbreaker | HM (Medium / Universal) |
Core Performance Benefits:
- Superior Surface Finish: The R0.4 radius is designed to leave a mirror-like finish on carbon and alloy steels, reducing the need for secondary grinding operations.
- Reduced Vibration: Lower radial forces make this insert perfect for long-overhang boring or machining unstable workpieces where chatter is a concern.
- NC3020 High-Speed Coating: Features a thick Alumina (Al2O3) layer that protects the carbide substrate from crater wear, even at speeds exceeding 300 m/min.
- Exceptional Economy: 6 usable cutting edges provide 50% more productivity per insert compared to standard 4-edge diamond (CNMG) inserts.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Max Depth (ap) |
|---|---|---|---|
| Carbon Steel (1045) | 220 - 380 m/min | 0.10 - 0.25 mm/rev | 2.0 mm |
| Alloy Steel (4140) | 180 - 300 m/min | 0.08 - 0.20 mm/rev | 1.5 mm |
Packaging: 10 pieces per box.
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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.