Korloy DNMG150408-VF NC3120 Steel Finishing Insert, R0.8 (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy DNMG150408-VF NC3120 (ANSI Standard: DNMG 432) is a high-performance 55° diamond insert engineered for precision finishing of Steel (P) and Cast Steel. Featuring the specialized VF (Variable Finishing) chipbreaker, this insert excels at breaking chips in light-duty applications where traditional inserts fail. The NC3120 grade utilizes an advanced CVD coating technology that provides exceptional heat resistance and edge stability, allowing for high cutting speeds while maintaining tight dimensional tolerances.
High-Speed Efficiency: The NC3120 grade is designed for stability and longevity. When your production requires high-velocity steel turning with a focus on surface integrity, the VF geometry ensures a clean, scratch-free finish by managing chip flow away from the workpiece.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | DNMG150408-VF |
| ANSI Code | DNMG 432 |
| Grade | NC3120 (Advanced CVD for Steel) |
| Nose Radius | 0.8 mm (Stable Finishing) |
Core Performance Benefits:
- VF Finishing Specialist: Unique chipbreaker design that ensures chip control even at low depths of cut (ap) and medium feed rates.
- CVD Multi-Layer Coating: Offers superior resistance to crater wear and plastic deformation under high-speed dry or wet machining.
- Tough Substrate: The NC3120 series features a balanced substrate that handles the thermal shock of intermittent finishing passes effectively.
- Optimized Surface Finish: Specifically designed to reduce friction and secondary cutting heat, resulting in a smooth, professional part appearance.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (AISI 1045) | 180 - 350 m/min | 0.10 - 0.30 mm/rev | 0.3 - 2.5 mm |
| Alloy Steel (4140/SCM440) | 150 - 300 m/min | 0.08 - 0.25 mm/rev | 0.3 - 2.0 mm |
| Mild Steel (A36/Low Carbon) | 200 - 400 m/min | 0.15 - 0.35 mm/rev | 0.5 - 3.0 mm |
Compatible Tool Holders:
Fits all standard 55-degree negative DNMG tool posts (15-size):
- External Holders: DDJNR/L 2020K15 / 2525M15 / 3232P15
- Boring Bars: S25S-DDUNR15 / S32T-DDUNR15 / S40U-DDUNR15
Steel Grade Selection: NC3120 vs. PC9030
Choosing the right coating for your material is key to productivity:
Optimized for Steel Turning. The thicker CVD coating allows for much higher cutting speeds and longer tool life in dry machining of carbon steels.
Optimized for Stainless Steel. While versatile, it cannot match the high-speed heat resistance of NC3120 when working exclusively with standard steels.
Machinist's Pro Tip: If you see "blue chips" in steel turning, it's often a sign of healthy heat evacuation. The NC3120 grade is built to thrive in these high-temp zones, whereas PVD grades would wear out much faster.
Packaging: 10 pieces per box.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.