Korloy DCMT11T302-HMP NC3020 Steel Finishing Turning Insert (10pcs)
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The Original Korloy DCMT11T302-HMP NC3020 (ANSI Standard: DCMT 32.50.5) is a premium CVD-coated turning insert engineered for high-precision finishing of Steel (P) and Carbon Steel. The combination of the 11T3 structural stability and a fine 0.2mm nose radius makes it the ultimate choice for achieving mirror-like surface finishes and sharp internal profiles. The NC3020 CVD grade is optimized for high-speed continuous cutting, offering industry-leading resistance to crater wear and heat deformation.
Ultra-Precision Finishing: The 0.2mm radius (R0.2) significantly reduces radial cutting forces, making this insert ideal for machining slender workpieces, thin-walled tubes, and parts requiring high dimensional accuracy without vibration.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DCMT11T302-HMP |
| ANSI Code | DCMT 32.50.5 |
| Grade | NC3020 (Premium CVD for Steel) |
| Nose Radius | 0.2 mm (Fine Detail) |
Core Performance Benefits:
- HMP Chipbreaker Geometry: Specially designed for finishing, providing excellent chip curling and breaking even at very light depths of cut.
- High-Speed Wear Resistance: The CVD coating allows for significantly higher spindle speeds, increasing productivity while maintaining a long tool life.
- Exceptional Surface Gloss: Optimized edge preparation ensures clean cutting action and prevents surface scratching.
- Stable Machining: The NC3020 substrate provides the necessary hardness to resist edge deformation during long continuous finishing cycles.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon/Mild Steel | 200 - 380 m/min | 0.05 - 0.12 mm/rev | 0.1 - 1.2 mm |
| Alloy Steel (4140/4340) | 150 - 300 m/min | 0.04 - 0.10 mm/rev | 0.1 - 1.0 mm |
| High Carbon Steel | 120 - 250 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.5 mm |
Compatible Tool Holders:
Fits all standard 55-degree diamond holders with 11T3 pockets:
- External Holders: SDJCR/L 1212 / 1616 / 2020K11
- Internal Boring Bars: S16Q-SDUCR11 / S20R-SDUCR11 / S25S-SDUCR11
Machinist's Selection Tip: NC3020 vs. NC3120
Choosing the right grade for steel finishing:
Best for Continuous Machining. Its higher wear resistance is perfect for long cuts where dimensional stability is critical. Excellent for high-speed CNC production.
Best for Versatility. If your cut involves light interruptions (like holes or slots) or if your setup isn't perfectly rigid, NC3120 offers better toughness against chipping.
Pro Insight: When using the R0.2 radius, ensure your machine spindle is running at high RPM to maintain the surface speed (Vc). This helps the HMP chipbreaker function effectively and produces the cleanest finish.
Packaging: 10 pieces per box.