Korloy DNMG110404-HM NC3030 Tough Steel Turning Insert (10pcs)
30-Day Free Returns
Free Worldwide Shipping
The Original Korloy DNMG110404-HM NC3030 (ANSI Standard: DNMG 331) is a high-performance 55° diamond turning insert engineered for interrupted and general-purpose turning of Steel (P). While many inserts fail during unstable cuts, the NC3030 grade features a specialized CVD coating and an ultra-tough carbide substrate that absorbs mechanical shocks. Combined with the HM chipbreaker, this insert provides reliable chip control and superior edge security for precision finishing on parts with keyways, holes, or uneven surfaces.
Built for Toughness: NC3030 is the "safety-first" grade for steel. It is designed to prevent sudden insert breakage (chipping) when the cutting process is interrupted or when the machine setup lacks perfect rigidity.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG110404-HM |
| ANSI Code | DNMG 331 |
| Grade | NC3030 (High-Toughness CVD) |
| Nose Radius | 0.4 mm (Precision Finishing) |
Core Performance Benefits:
- Superior Shock Resistance: The substrate is specifically formulated to handle impact, making it the best choice for interrupted cuts.
- Optimized CVD Coating: Provides excellent adhesion resistance, preventing built-up edge even when machining gummy low-carbon steels.
- HM Precision Geometry: Ensures smooth chip flow and breaking at light-to-medium depths of cut, even in less-than-ideal conditions.
- Reliable Tool Life: Delivers predictable performance across a variety of steel materials, reducing the risk of catastrophic tool failure.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (Interrupted) | 140 - 260 m/min | 0.08 - 0.22 mm/rev | 0.4 - 2.0 mm |
| Alloy Steel (AISI 4140) | 120 - 220 m/min | 0.10 - 0.20 mm/rev | 0.5 - 1.8 mm |
| Cast Steel / Forgings | 100 - 180 m/min | 0.08 - 0.25 mm/rev | 0.5 - 2.2 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative holders for 11-size inserts:
- External Turning: DDJNR/L 1616H11 / 2020K11 / 2525M11
- Internal Boring Bars: S20R-DDUNR11 / S25S-DDUNR11 / S32T-DDUNR11
Steel Grade Selection: NC3030 vs. NC3020
How to choose based on your machining environment:
Best for Heavy Interrupted Cuts and Old Machines. Choose this if you are experiencing edge chipping or if your setup is prone to vibration. It trades some speed for maximum reliability.
Best for Continuous Turning. If your cut is smooth and your machine is rigid, NC3020 allows for higher speeds and offers better wear resistance for longer tool life.
Machinist's Pro Tip: If you are working with semi-forged parts or shafts with keyways, the DNMG110404 in NC3030 is your insurance policy against downtime.
Packaging: 10 pieces per box.