Korloy WNMG060404-HM NC3020 (WNMG 331-HM) Carbide Turning Insert (10pcs)
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The Original Korloy WNMG060404-HM NC3020 (ANSI: WNMG 331-HM) is the compact powerhouse of the Rich Mill Turning Series. Specifically designed for Small Diameter Workpieces and Internal Boring operations, the 06-size offers exceptional maneuverability in tight spaces without compromising on the economic advantage of its 6 cutting edges. The NC3020 CVD grade ensures high-speed stability and heat resistance when machining a wide range of carbon and alloy steels.
Precision in Every Edge: The 0.4mm (1/64") radius is the professional choice for finishing and semi-finishing. It minimizes cutting pressure and heat generation, preventing deflection on slender parts while achieving a superior mirror-like surface finish.
Technical Specifications (ISO Metric vs. ANSI Inch):
| ISO Designation | WNMG 060404-HM |
| ANSI Designation | WNMG 331-HM |
| Insert Size (IC) | 9.525 mm / (3/8") |
| Corner Radius (r) | 0.4 mm / (1/64") |
| Grade | NC3020 (CVD Coated Steel Grade) |
| Target Material | General Steels, Alloy Steels, Cast Steel (P) |
Core Performance Benefits:
- Compact Footprint: Perfectly suited for smaller tool holders (1616 or 2020 shank) and high-precision boring bars where space is at a premium.
- 6 Usable Cutting Edges: Even in the smaller 06 size, you retain the maximum economic benefit of the Trigon shape, reducing your cost-per-part significantly.
- Optimized HM Chipbreaker: The Medium (HM) geometry is tuned for versatility, providing excellent chip control from light finishing to medium roughing passes.
- Advanced CVD NC3020 Technology: Features a thick Al2O3 layer that excels in high-speed, high-temperature cutting, ensuring predictable tool life and stable performance.
Recommended Cutting Parameters:
| Material | Cutting Speed (Vc) | Feed Rate (fn) | Max Depth (ap) |
|---|---|---|---|
| Low Carbon Steel | 200 - 350 m/min | 0.10 - 0.25 mm/rev | 2.0 mm |
| Hardened Alloy Steel | 150 - 280 m/min | 0.08 - 0.20 mm/rev | 1.5 mm |
Pro Tip: Internal Boring Excellence
When using the WNMG060404 for internal boring, ensure your boring bar diameter is at least 1.5x the insert width for maximum rigidity. The 0.4mm radius is specifically beneficial here as it reduces radial cutting forces, minimizing the risk of vibration and chatter in deep holes.
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.