Korloy DCMT11T304-HMP NC3030 Steel Turning Insert for Interrupted Cuts (10pcs)
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The Original Korloy DCMT11T304-HMP NC3030 (ANSI Standard: DCMT 32.51) is a high-toughness CVD-coated insert engineered for Steel (P) turning under unstable or interrupted conditions. While maintainng the precision-oriented HMP chipbreaker, the NC3030 grade provides a thicker, more impact-resistant coating layer. This makes it the premier choice for machining structural steels, forgings, and workpieces with surface scale or heavy interruptions where standard grades might chip.
The Stability Specialist: NC3030 is specifically designed to prevent catastrophic edge failure. It excels in "non-ideal" environments, such as older CNC machines, long-overhang setups, or workpieces with interrupted geometries like keyways and holes.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DCMT11T304-HMP |
| ANSI Code | DCMT 32.51 |
| Grade | NC3030 (High-Toughness CVD for Steel) |
| Nose Radius | 0.4 mm (Versatile Strength & Finish) |
Core Performance Benefits:
- Shock-Resistant Coating: The NC3030's CVD layers are optimized to absorb mechanical vibration and thermal shock, extending life in roughing cycles.
- HMP Finishing Control: Even with a tough grade, the HMP geometry ensures excellent chip breaking at light-to-medium depths of cut.
- Work-Hardening Resistance: Effectively cuts through tough surface layers on carbon and alloy steels without premature dulling.
- High Versatility: A reliable "safety-first" grade that handles a wide range of steel types with predictable performance.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Structure Steel (Low Carbon) | 150 - 280 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
| Forged Steel / Alloy Steel | 120 - 220 m/min | 0.12 - 0.28 mm/rev | 0.8 - 3.0 mm |
| Interrupted Steel Cut | 80 - 150 m/min | 0.08 - 0.20 mm/rev | 0.5 - 2.0 mm |
Compatible Tool Holders:
Designed for all standard 55° diamond tool holders (11T3 size):
- External Turning: SDJCR/L 1616H11 / 2020K11 / 2525M11
- Internal Boring: S16Q-SDUCR11 / S20R-SDUCR11 / S25S-SDUCR11
Steel Grade Selection: NC3030 vs. NC3020
How to choose the right CVD grade for your steel job:
Choose this for Roughing or Interrupted Cuts. It is designed to survive impact. Perfect for forged parts and general workshop use where reliability is priority #1.
Choose this for High-Speed Continuous Turning. It offers better longevity during long finishing passes in stable conditions but is more prone to chipping in interruptions.
Machinist's Pro Tip: If you are running an older machine or a "sketchy" setup with a lot of vibration, the NC3030 is your insurance policy against broken inserts.
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.