Korloy DNMG110408-HM NC3030 Tough Steel Turning Insert, R0.8 (10pcs)
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The Original Korloy DNMG110408-HM NC3030 (ANSI Standard: DNMG 332) is the ultimate problem-solver for unstable steel turning applications. Designed with a robust 0.8mm nose radius, this insert offers maximum edge strength for semi-finishing and medium-duty cutting. The NC3030 grade is Korloy's premier high-toughness CVD solution, specifically engineered to withstand heavy interrupted cuts, forged surfaces, and mechanical shocks that would shatter standard inserts.
Maximum Edge Security: If your project involves turning shafts with keyways, hexagonal bars, or workpieces with rough "black" outer skins, the NC3030 in an R0.8 radius provides the necessary durability to keep your machine running without unexpected downtime.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG110408-HM |
| ANSI Code | DNMG 332 |
| Grade | NC3030 (Maximum Toughness CVD) |
| Nose Radius | 0.8 mm (Enhanced Shock Resistance) |
Core Performance Benefits:
- Shock-Absorbent Substrate: Prevents crack propagation even during violent mechanical interruptions.
- R0.8 Edge Strength: The larger radius dissipates heat more effectively and supports higher feed rates than R0.4 models.
- Advanced CVD Coating: Resists peeling and built-up edge, even when machining gummy low-carbon or structural steels.
- 4 Cutting Edges: Double-sided negative geometry offers high cost-performance for roughing and semi-finishing.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Steel with Heavy Interruption | 100 - 180 m/min | 0.15 - 0.35 mm/rev | 0.8 - 3.5 mm |
| Forged/Cast Steel (Rough Surface) | 80 - 160 m/min | 0.12 - 0.30 mm/rev | 1.0 - 4.0 mm |
| Carbon Steel (General Duty) | 140 - 240 m/min | 0.15 - 0.40 mm/rev | 1.0 - 4.5 mm |
Compatible Tool Holders:
Compatible with all standard 55° negative holders (11-size pocket):
- External Turning: DDJNR/L 2020K11 / 2525M11 / 3232P11
- Heavy Boring Bars: S25S-DDUNR11 / S32T-DDUNR11
The "Toughness" Scale: NC3030 vs. NC3120
Which reliable grade should you choose for steel?
The "Safety Grade". Use this for the most violent interruptions, forged skins, and unstable setups. It prevents the insert from snapping, even if it means running at slightly lower speeds.
The "All-Rounder". Best for general turning with light interruptions. It offers a higher wear resistance than NC3030 while still being tougher than the high-speed NC3020.
Machinist's Pro Tip: If you are working on a manual lathe or a CNC with low rigidity, NC3030 is your best friend. Its forgiving nature prevents edge micro-chipping that often occurs with harder grades.
Packaging: 10 pieces per box.