Korloy DNMG150404-HM NC3020 Steel Finishing Turning Insert (10pcs)
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The Original Korloy DNMG150404-HM NC3020 (ANSI Standard: DNMG 431) is a heavy-duty 55° diamond turning insert optimized for precision finishing of Steel (P) and Carbon Steel. As one of the most widely used sizes in the industry, the DNMG1504 offers superior stability and heat dissipation. The NC3020 CVD grade is engineered for high-speed continuous cutting, providing industry-leading resistance to crater wear and ensuring mirror-like surface finishes on a wide range of ferrous materials.
Ultimate Finishing Precision: The 0.4mm nose radius (R0.4) combined with the HM chipbreaker allows for ultra-fine control over chip flow, preventing surface marring and ensuring tight dimensional tolerances even at high surface speeds.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150404-HM |
| ANSI Code | DNMG 431 |
| Grade | NC3020 (Premium CVD for Steel) |
| Nose Radius | 0.4 mm (Precision Finishing) |
Core Performance Benefits:
- CVD Al2O3 Coating: Offers exceptional thermal protection, allowing for higher cutting speeds (Vc) without deformation of the cutting edge.
- HM Chipbreaker: Specially tuned for finishing, providing excellent chip curling and breaking at shallow depths of cut.
- High Edge Stability: The DNMG15 size provides more "body" to the insert, reducing vibration and heat buildup compared to smaller 11-size inserts.
- Economic 4-Edge Design: Double-sided negative geometry offers four sharp cutting edges for cost-effective production.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Mild Steel (Low Carbon) | 220 - 400 m/min | 0.08 - 0.20 mm/rev | 0.2 - 1.5 mm |
| Alloy Steel (4140 / 4340) | 180 - 350 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.2 mm |
| Cast Steel / Tool Steel | 140 - 280 m/min | 0.08 - 0.25 mm/rev | 0.5 - 2.0 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative holders for 15-size inserts:
- External Turning: DDJNR/L 2020K15 / 2525M15 / 3232P15
- Boring Bars: S25S-DDUNR15 / S32T-DDUNR15 / S40U-DDUNR15
The Professional's Grade Choice: NC3020 vs. NC3120
Selecting the right CVD grade for your heavy-duty DNMG 15 series:
Optimized for Continuous Cuts. Best for finishing long shafts or large diameter steel parts where tool wear must be kept to a minimum to maintain tolerance.
Best for Versatility. If your workpiece has keyways, cross-holes, or if the machine setup is not perfectly rigid, NC3120 provides the extra toughness needed to prevent chipping.
Machinist's Pro Tip: For the best surface finish with the R0.4 radius, ensure your feed rate is set to approximately 50% of the nose radius (f ≈ 0.15-0.20 mm/rev) to maximize the "burnishing" effect.
Packaging: 10 pieces per box.