Korloy CNMG190608-GR NC3030 Heavy-Duty Roughing Insert (10pcs)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy CNMG190608-GR NC3030 (ANSI Standard: CNMG 642) is a heavy-duty powerhouse designed for large-scale stock removal in the most challenging steel machining conditions. This oversized "1906" insert features a 6.35mm thickness, providing the thermal mass and mechanical strength required for deep roughing. The GR chipbreaker is reinforced for heavy roughing, while the NC3030 CVD grade is Korloy's toughest steel grade, engineered specifically to withstand heavy interrupted cuts, vibrations, and the abrasive surface of forged parts.
Built for Toughness: The 0.8mm nose radius on this large-format insert is ideal for reducing cutting resistance and vibration during deep-hole boring or heavy external turning on older, less rigid machines.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG190608-GR |
| ANSI Code | CNMG 642 |
| Grade | NC3030 (Maximum Toughness CVD Coating) |
| Nose Radius | 0.8 mm (Low Cutting Force Roughing) |
Core Performance Benefits:
- Maximum Edge Security: The NC3030 substrate absorbs high-impact energy during interrupted cuts, preventing sudden insert shattering.
- Enhanced Chip Control: The GR (Heavy Roughing) geometry is designed to break thick, difficult chips even at large depths of cut.
- Vibration Control: The R0.8 radius generates less radial pressure than larger radii, helping to stabilize the cut on slender workpieces or long-overhang setups.
- Thick CVD Coating: Provides a robust thermal barrier for machining dry or with minimal coolant on large-diameter components.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Carbon Steel (Heavy Interruption) | 100 - 200 m/min | 0.25 - 0.55 mm/rev | 3.0 - 9.0 mm |
| Forged Steel / Scale | 80 - 180 m/min | 0.30 - 0.60 mm/rev | 3.0 - 10.0 mm |
| Large Cast Steel Parts | 70 - 150 m/min | 0.25 - 0.50 mm/rev | 2.5 - 8.0 mm |
Compatible Tool Holders:
Ensure your holder is designed for the 19-series inserts to provide maximum support:
- External Turning: PCLNR/L 3232P19 / PCLNR/L 4040R19
Roughing Pro-Tip: NC3030 vs. NC3020
Which toughness level do you need for your large-scale project?
First choice for badly interrupted cuts and heavy forging skin. It prioritizes the survival of the cutting edge over speed.
Best for stable, continuous heavy roughing. Allows for higher cutting speeds (Vc) and better productivity on clean surfaces.
Machinist's Insight: Using an R0.8 radius on a giant 1906 insert is a strategic choice—it allows you to achieve incredible depths of cut (ap) without overloading the machine's spindle motor.
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.