Korloy DCMT11T304-HMP 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 DCMT11T304-HMP NC3020 (ANSI Standard: DCMT 32.51) is the industry's go-to solution for finishing and semi-finishing of Steel (P) and Carbon Steel. This insert features a 0.4mm (1/64") nose radius, offering the ideal combination of surface finish quality and edge durability. Powered by the NC3020 CVD coating, it is engineered for high-speed continuous turning, providing exceptional resistance to crater wear and heat, ensuring stable performance in high-volume production.
High-Speed Efficiency: The NC3020 grade is designed to thrive at elevated cutting speeds. Its thick CVD coating acts as a superior thermal barrier, protecting the carbide substrate and extending tool life in dry or wet steel machining.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DCMT11T304-HMP |
| ANSI Code | DCMT 32.51 |
| Grade | NC3020 (CVD Coated for Steel) |
| Nose Radius | 0.4 mm (Industry Standard) |
Core Performance Benefits:
- HMP Finishing Geometry: Excellent chip control at light-to-medium depths of cut, preventing long, stringy chips from marring the workpiece surface.
- Extended Tool Life: The NC3020 substrate provides high-temperature hardness, maintaining a sharp edge even during long, continuous cuts.
- Versatile Application: While optimized for steel, it delivers reliable results across a variety of carbon and alloy steels.
- Superior Finish: Precise edge preparation ensures smooth cutting action and lower vibration, resulting in high-quality surface gloss.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Mild Steel (Low Carbon) | 220 - 400 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 |
| Structure Steel (S45C) | 150 - 280 m/min | 0.12 - 0.28 mm/rev | 0.8 - 3.0 mm |
Compatible Tool Holders:
Fits all standard 55-degree diamond tool holders for 11T3 size:
- External Turning: SDJCR/L 1616H11 / 2020K11 / 2525M11
- Internal Boring: S16Q-SDUCR11 / S20R-SDUCR11 / S25S-SDUCR11
Steel Grade Pro-Tip: NC3020 vs. NC3120
Choosing the right CVD grade for your shop:
Best for Continuous Turning. Its superior wear resistance makes it the first choice for long cuts and high-speed CNC applications where dimensional accuracy is paramount.
Best for Universal Machining. If your job involves light interruptions or an unstable setup, NC3120 provides the extra toughness needed to prevent edge chipping.
Machinist's Insight: For the best results with NC3020, use high-pressure coolant to flush chips away from the HMP chipbreaker. This prevents chip recutting and maximizes surface gloss.
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.