Korloy DCMT070204-HMP NC3220 New Gen Steel Turning Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy DCMT070204-HMP NC3220 (ANSI Standard: DCMT 21.51) represents the next generation of Steel (P) and Carbon Steel turning efficiency. Building on the success of the universal NC3120, the NC3220 grade features an enhanced CVD coating structure that provides superior thermal stability and flank wear resistance. Combined with the precision HMP chipbreaker, this insert is a high-performance workhorse for small CNC lathes and Swiss-type machines, ensuring maximum tool life in both continuous and slightly unstable cutting conditions.
Next-Gen Productivity: NC3220 is designed to bridge the gap between high-speed wear resistance and impact toughness. It allows for longer run times and higher reliability compared to traditional steel grades, reducing tool change frequency in automated production.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DCMT070204-HMP |
| ANSI Code | DCMT 21.51 |
| Grade | NC3220 (New Gen CVD for Steel) |
| Nose Radius | 0.4 mm (Versatile Precision) |
Core Performance Benefits:
- Enhanced Thermal Resistance: The new CVD coating technology prevents heat buildup at the cutting edge, even during high-speed finishing.
- Stable Edge Toughness: Minimizes micro-chipping in light interrupted cuts or when machining workpieces with uneven surface hardness.
- Superior HMP Chip Control: Specifically engineered for DCMT07 size, ensuring clean chip breaking at low feed rates and small depths of cut.
- Versatile Application: Excels in a wide variety of steels, from mild low-carbon to high-strength alloy steels.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (AISI 1045) | 160 - 320 m/min | 0.08 - 0.22 mm/rev | 0.4 - 2.5 mm |
| Alloy Steel (AISI 4140) | 140 - 280 m/min | 0.10 - 0.20 mm/rev | 0.5 - 2.0 mm |
| Low Carbon / Mild Steel | 180 - 350 m/min | 0.08 - 0.25 mm/rev | 0.5 - 2.5 mm |
Compatible Tool Holders:
Compatible with all standard 55° diamond holders (07 size):
- External Tool Holders: SDJCR/L 0808 / 1010 / 1212F07 / 1616H07
- Internal Boring Bars: S08K-SDUCR07 / S10K-SDUCR07 / S12M-SDUCR07
Upgrade Guide: NC3220 vs. NC3120
Should you switch to the new generation?
Choose this for Higher Efficiency & Longer Life. It is the evolution of steel grades, offering better heat resistance and a more stable cutting edge for modern high-speed CNCs.
The Traditional Choice. Reliable and proven, but lacks the advanced coating advancements of the NC3220 series for high-speed wear resistance.
Machinist's Pro Tip: If you are experiencing "crater wear" on top of the insert due to high heat, NC3220 is the specific solution designed to solve that problem.
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.