Korloy DNMG110408-HM NC3020 Steel Turning Insert, R0.8 (10pcs)
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The Original Korloy DNMG110408-HM NC3020 (ANSI Standard: DNMG 332) is a high-performance 55° diamond insert designed for efficient semi-finishing and medium-duty turning of Steel (P). Featuring a robust 0.8mm nose radius, this insert provides superior edge strength and thermal dissipation compared to smaller radii models. The NC3020 CVD grade is engineered for high-speed continuous cutting, offering industry-leading resistance to crater wear and maintaining long-term dimensional stability in carbon and alloy steels.
High-Feed Efficiency: The R0.8 radius (DNMG 332) allows for significantly higher feed rates without compromising edge security. It is the ideal choice for high-volume production where reducing cycle time is as important as surface quality.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG110408-HM |
| ANSI Code | DNMG 332 |
| Grade | NC3020 (High-Speed CVD for Steel) |
| Nose Radius | 0.8 mm (Enhanced Durability) |
Core Performance Benefits:
- Maximum Edge Security: The R0.8 geometry handles mechanical shock better than R0.4, making it more durable in long-run production.
- Optimized HM Chipbreaker: Engineered for semi-finishing, ensuring stable chip breaking even at higher feed rates and varying depths of cut.
- CVD Coating Excellence: NC3020's advanced coating acts as a thermal barrier, allowing for elevated cutting speeds (Vc) in dry or wet conditions.
- Four Cutting Edges: The negative DNMG geometry offers 4 usable edges, providing excellent economic value per component.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Mild Steel (Low Carbon) | 180 - 350 m/min | 0.15 - 0.35 mm/rev | 0.8 - 3.5 mm |
| Alloy Steel (4140 / 4340) | 150 - 280 m/min | 0.12 - 0.30 mm/rev | 0.5 - 3.0 mm |
| Die Steel / Tool Steel | 100 - 220 m/min | 0.15 - 0.32 mm/rev | 1.0 - 4.0 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative holders with 11-size pockets:
- External Tool Holders: DDJNR/L 2020K11 / 2525M11 / 3232P11
- Internal Boring Bars: S25S-DDUNR11 / S32T-DDUNR11
Steel Machining Pro-Tip: R0.8 vs. R0.4
Which nose radius should you choose for DNMG 11?
Best for Efficiency & Strength. It allows for much higher feed rates and is less likely to chip. Ideal for semi-finishing larger parts where cycle time reduction is key.
Best for Precision & Low Pressure. Choose R0.4 if you need a finer surface finish at lower feed rates or if you are working with slender workpieces prone to vibration.
Machinist's Insight: For general semi-finishing of steel, the DNMG110408 in NC3020 is the most balanced choice for high-speed CNC turning.
Packaging: 10 pieces per box.