Korloy DNMG110404-HM NC3020 Steel Turning Insert, R0.4 (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy DNMG110404-HM NC3020 (ANSI Standard: DNMG 331) is a high-performance, double-sided 55° diamond insert optimized for the high-speed finishing and semi-finishing of Steel (P). Engineered with a premium CVD coating, the NC3020 grade provides an excellent thermal barrier and superior resistance to crater wear. Combined with the HM chipbreaker, this insert excels in chip control and maintains precise dimensional tolerances during long production runs.
Efficiency & Longevity: NC3020 is Korloy’s flagship grade for continuous steel turning. It is designed to maximize productivity by allowing higher cutting speeds (Vc) without sacrificing the integrity of the cutting edge.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG110404-HM |
| ANSI Code | DNMG 331 |
| Grade | NC3020 (CVD Coated for Steel) |
| Nose Radius | 0.4 mm (Precision Finishing) |
Core Performance Benefits:
- High-Speed Stability: The thick CVD coating protects the carbide substrate from heat deformation during high RPM operations.
- HM Chipbreaker: Designed for finishing to semi-finishing, offering sharp cutting action and reliable chip breaking even at lower feed rates.
- Exceptional Edge Life: Superior resistance to flank and crater wear in carbon steel and alloy steel.
- 4 Cutting Edges: As a negative geometry (DNMG) insert, it provides 4 usable edges for maximum cost-efficiency.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon / Mild Steel | 200 - 380 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Alloy Steel (4140 / 4340) | 180 - 320 m/min | 0.08 - 0.22 mm/rev | 0.5 - 2.0 mm |
| High Carbon Steel | 150 - 280 m/min | 0.10 - 0.28 mm/rev | 0.8 - 3.0 mm |
Compatible Tool Holders:
Designed for 55-degree negative holders with 11-size pockets:
- External Holders: DDJNR/L 1616H11 / 2020K11 / 2525M11
- Boring Bars: S25S-DDUNR11 / S32T-DDUNR11
Steel Grade Pro-Tip: NC3020 vs. CN2000 (Cermet)
Choosing between Coated Carbide and Cermet for steel finishing:
The Versatile Performer. Best for 80% of steel turning. It is tougher than Cermet, making it safer for higher feed rates, deeper cuts, and slightly unstable machine conditions.
The Mirror Finish Specialist. Use Cermet for ultra-high-speed final finishing on stable machines. While brittle, it provides the best surface brightness and dimensional precision.
Machinist's Insight: If your machine setup is very rigid and you need the best possible finish, go with CN2000. If you need a reliable workhorse for varied steel parts, NC3020 is the most secure investment.
Packaging: 10 pieces per box.
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.