Korloy DNMG110404-HM CN2000 Cermet Turning Insert for Mirror Finish (10pcs)
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The Original Korloy DNMG110404-HM CN2000 (ANSI Standard: DNMG 331) is a premium Cermet turning insert designed specifically for the high-speed finishing of Steel (P) and Carbon Steel. Unlike traditional carbide, the CN2000 Cermet grade offers exceptional chemical stability and heat resistance, preventing built-up edge and ensuring a mirror-like surface finish. Combined with the HM chipbreaker, this insert provides excellent chip control and dimensional accuracy for precision-engineered components.
The Finishing Specialist: CN2000 Cermet is the professional's choice for final passes. It maintains a sharp cutting edge much longer than coated carbide when running at high surface speeds, resulting in consistent tolerances across large production batches.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG110404-HM |
| ANSI Code | DNMG 331 |
| Grade | CN2000 (High-Speed Cermet) |
| Nose Radius | 0.4 mm (Precision Finishing) |
Core Performance Benefits:
- Mirror Finish Surface: The ceramic-metal composite resists "welding" of the workpiece material, producing a bright, smooth finish.
- Extreme Heat Resistance: Maintains hardness at high RPMs where standard carbide would soften.
- HM Chipbreaker: Specifically designed for semi-finishing to finishing, providing stable chip breaking at shallow depths of cut.
- Double-Sided Value: The DNMG geometry provides 4 usable cutting edges, offering excellent cost-per-edge for finishing operations.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel / Mild Steel | 250 - 500 m/min | 0.05 - 0.20 mm/rev | 0.2 - 1.5 mm |
| Alloy Steel (4140/4340) | 200 - 400 m/min | 0.05 - 0.15 mm/rev | 0.2 - 1.2 mm |
| Free-Cutting Steel | 300 - 600 m/min | 0.10 - 0.25 mm/rev | 0.3 - 2.0 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative holders (DNMG 1104 / 33 size):
- External Turning: DDJNR/L 2020K11 / 2525M11
- Boring Bars: S25S-DDUNR11 / S32T-DDUNR11
Cermet Tip: CN2000 vs. Coated Carbide (NC3020)
When to choose Cermet for your project:
Best for High-Speed Finishing. Use Cermet when surface quality is the top priority. It performs best in dry machining or with minimal coolant on continuous cuts.
Best for General Semi-Roughing to Finishing. Carbide is tougher than Cermet and can handle interrupted cuts or heavier loads that might cause Cermet to crack.
Machinist's Pro Tip: Cermet (CN2000) thrives on speed. If you run it too slow, it may chip. Increase your RPM to get that famous Korloy mirror finish!
Packaging: 10 pieces per box.