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.