Korloy DCMT11T308-HMP NC3120 Universal Steel Turning Insert, R0.8 (10pcs)
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The Original Korloy DCMT11T308-HMP NC3120 (ANSI Standard: DCMT 32.52) is a robust 55° diamond turning insert engineered for universal applications in Steel (P) and Carbon Steel. Featuring a strong 0.8mm nose radius, this insert offers maximum edge security and excellent thermal dissipation. The NC3120 grade is Korloy's most balanced CVD solution, providing the perfect middle ground between high wear resistance and impact toughness, making it reliable for everything from continuous finishing to light interrupted cuts.
High Reliability & Productivity: The combination of the R0.8 radius and NC3120 grade allows for aggressive feed rates and higher stability in non-rigid setups. If you're dealing with varied steel materials or "mixed" production runs, this is your most dependable tool.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DCMT11T308-HMP |
| ANSI Code | DCMT 32.52 |
| Grade | NC3120 (Universal CVD for Steel) |
| Nose Radius | 0.8 mm (Enhanced Edge Security) |
Core Performance Benefits:
- Exceptional Edge Strength: The R0.8 geometry supports high-feed rates and resists chipping during interrupted cuts.
- CVD Multi-Layer Coating: Protects against high temperatures and abrasive wear, ensuring consistent surface finishes.
- HMP Chipbreaker: Optimized for semi-finishing, providing effective chip breaking and reducing the risk of chip-clogging.
- Versatile Substrate: The NC3120 core is tough enough to survive mechanical shocks while maintaining a sharp cutting edge.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (S45C/1045) | 180 - 320 m/min | 0.15 - 0.35 mm/rev | 0.8 - 3.5 mm |
| Alloy Steel (4140/SCM440) | 150 - 260 m/min | 0.12 - 0.30 mm/rev | 0.8 - 3.0 mm |
| Steel with Light Interruptions | 100 - 180 m/min | 0.10 - 0.25 mm/rev | 0.5 - 2.5 mm |
Compatible Tool Holders:
Fits all standard 55-degree diamond holders (11T3 size):
- External Holders: SDJCR/L 2020K11 / 2525M11 / 3232P11
- Internal Boring Bars: S20R-SDUCR11 / S25S-SDUCR11 / S32T-SDUCR11
Machinist's Selection Guide: NC3120 vs. NC3030
Which "Tough" grade should you use for Steel?
Optimized for Efficiency & Versatility. Best for 80% of steel turning tasks. It offers a higher cutting speed limit than NC3030 while still being tough enough for general shop work.
Best for Interrupted Cuts & Rough Surface Scale. If your NC3120 is chipping during violent interruptions or when cutting forged skins, switch to NC3030 for maximum impact resistance.
Pro Tip: When using the R0.8 radius, ensure your machine has enough power to maintain the recommended feed rate. A higher feed rate helps the HMP chipbreaker function at its peak, providing clean chip evacuation.
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.