Korloy DNMG150604-VF NC3120 Thick Steel Finishing Insert, R0.8 (10pcs)
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The Original Korloy DNMG150608-VF NC3120 (ANSI Standard: DNMG 442) is a premium 55° diamond insert engineered for Stable, High-Precision Finishing of Steel (P) and Cast Steel. With a heavy-duty 6.35mm thickness, this insert provides the rigidness required for long-reach turning or machining large workpieces where vibration can be an issue. The VF (Variable Finishing) chipbreaker is specifically designed to prevent "bird-nesting" at fine depths of cut, while the NC3120 CVD coating offers world-class wear resistance and heat dissipation for high-speed CNC operations.
Stability Meets Precision: If you are struggling with surface finish on large alloy steel shafts, the 1506 thickness combined with the VF geometry is your solution. It dampens harmonics and snaps chips into small, manageable pieces, ensuring a mirror-like finish without manual intervention.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150608-VF |
| ANSI Code | DNMG 442 |
| Grade | NC3120 (Premium CVD for Steel) |
| Thickness | 6.35 mm (Heavy-Duty Stability) |
Core Performance Benefits:
- Expert Chip Control: The VF geometry is optimized for the finishing range, ensuring chips are broken even at light loads to protect your workpiece surface.
- CVD Multi-Layer Coating: The NC3120 grade provides a thick thermal barrier, allowing for higher cutting speeds (Vc) and extended tool life compared to PVD grades.
- Vibration Suppression: The 1506 body thickness absorbs cutting forces better than standard 1504 inserts, making it ideal for large lathes.
- R0.8 Radius Advantage: Offers the perfect balance of edge strength and a high-quality surface finish (Ra).
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Low Carbon Steel (1018/A36) | 200 - 450 m/min | 0.15 - 0.35 mm/rev | 0.5 - 3.0 mm |
| Alloy Steel (4140/SCM440) | 160 - 320 m/min | 0.10 - 0.28 mm/rev | 0.3 - 2.0 mm |
| Tool Steel (D2/P20) | 120 - 220 m/min | 0.10 - 0.25 mm/rev | 0.3 - 1.5 mm |
Compatible Tool Holders:
Ensure you use holders designed for the 1506 (6.35mm thickness) pocket:
- External Precision Turning: DDJNR/L 2525M15 / 3232P15
- Internal Boring Bars: S32T-DDUNR15 / S40U-DDUNR15 / S50V-DDUNR15
Choosing the Right Steel Grade: NC3120 vs. NC3220
Korloy offers different CVD grades to match your cutting environment:
Optimized for Continuous Cutting. It has superior wear resistance for high-speed finishing where tool life and surface finish are the top priorities.
Optimized for Interrupted Cutting. If your job involves heavy pulsing or hex material, NC3220 offers better toughness to prevent edge chipping.
Machinist's Pro Tip: For the best results with the VF chipbreaker, maintain a Cutting Speed (Vc) above 200 m/min in carbon steel. The heat generated at these speeds helps the VF geometry curl the chip more effectively.
Packaging: 10 pieces per box.