Korloy DNMG150408-HM NC3020 Steel Turning Insert, R0.8 (10pcs)
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The Original Korloy DNMG150408-HM NC3020 (ANSI Standard: DNMG 432) is a robust 55° diamond turning insert engineered for high-efficiency semi-finishing and medium-duty turning of Steel (P). Featuring a strong 0.8mm (1/32") nose radius, this insert offers maximum edge security and allows for higher feed rates compared to finishing models. The NC3020 CVD coating provides a superior thermal barrier, making it the primary choice for high-speed continuous turning where productivity and long tool life are essential.
Maximum Productivity: The R0.8 radius design facilitates excellent heat dissipation and resists edge chipping. Combined with the HM chipbreaker, it ensures stable chip control even at aggressive feed rates in carbon and alloy steels.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150408-HM |
| ANSI Code | DNMG 432 |
| Grade | NC3020 (Premium CVD for Steel) |
| Nose Radius | 0.8 mm (Strong & Versatile) |
Core Performance Benefits:
- Durable Edge Strength: The R0.8 radius is significantly tougher than R0.4, making it ideal for heavier cuts and longer run times.
- High-Speed Wear Resistance: NC3020 grade features a thick CVD coating that prevents crater wear during high-velocity machining.
- Versatile HM Geometry: The HM chipbreaker is optimized for medium range applications, providing excellent chip curling across various steel grades.
- Cost Efficient: Negative geometry provides 4 usable cutting edges, doubling the value compared to positive inserts.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (S45C) | 200 - 350 m/min | 0.15 - 0.40 mm/rev | 1.0 - 4.0 mm |
| Alloy Steel (4140) | 150 - 280 m/min | 0.12 - 0.35 mm/rev | 0.8 - 3.5 mm |
| Structural Steel (SS400) | 180 - 320 m/min | 0.20 - 0.45 mm/rev | 1.0 - 4.5 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative holders for 15-size inserts:
- External Turning: DDJNR/L 2020K15 / 2525M15 / 3232P15
- Heavy Duty Boring: S25S-DDUNR15 / S32T-DDUNR15 / S40U-DDUNR15
The "Golden Rule" for Steel Grades: NC3020 vs. NC3120
Which grade fits your machining environment best?
Best for Continuous Turning. Use this for mass production where the cutting conditions are stable. It offers the highest wear resistance at high temperatures.
Best for Mixed Operations. If you are cutting through crusty forged surfaces or have light interrupted cuts, NC3120’s balanced toughness prevents the edge from micro-chipping.
Machinist's Insight: For the DNMG150408, if you see the tool wearing down too fast, stick with NC3020 but ensure your coolant is pointed directly at the tip to maximize the CVD coating's life.
Packaging: 10 pieces per box.