Korloy CNMG190608-GR NC3030 Heavy-Duty Roughing Insert (10pcs)
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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.