Korloy CNMG190612-GR NC3020 Heavy-Duty Steel Roughing Insert (10pcs)
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The Original Korloy CNMG190612-GR NC3020 (ANSI Standard: CNMG 643) is a premier solution for heavy-scale industrial steel turning. As one of the largest standard inserts available, the 1906 series offers the massive structural integrity and thermal mass needed to withstand extreme cutting forces on large CNC lathes. The GR (Heavy Roughing) chipbreaker features a highly reinforced cutting edge designed to plow through heavy depths of cut, while the NC3020 CVD coating provides the wear resistance required for sustained high-speed operations in carbon and alloy steels.
Engineered for Scale: The CNMG1906 series is designed for heavy-duty machines where standard 12mm or 16mm inserts would fail due to excessive heat or mechanical stress. This is the professional's choice for maximizing Material Removal Rate (MRR).
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG190612-GR |
| ANSI Code | CNMG 643 |
| Grade | NC3020 (CVD - High Efficiency Steel Grade) |
| Insert Thickness | 6.35 mm (Heavy Duty) |
Core Performance Benefits:
- Extreme Metal Removal: The GR chipbreaker allows for massive depths of cut (ap) and aggressive feed rates, significantly reducing cycle times on large parts.
- Superior Heat Dissipation: The large carbide volume effectively sinks heat away from the cutting edge, prolonging tool life during long, continuous cuts.
- Stable Edge Geometry: Reinforced T-land design prevents edge chipping when encountering hard spots or uneven surfaces on steel castings and forgings.
- High-Velocity Coating: NC3020's advanced CVD layer is optimized for higher cutting speeds, boosting overall factory productivity.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Medium Carbon Steel | 150 - 280 m/min | 0.35 - 0.85 mm/rev | 4.0 - 10.0 mm |
| Alloy Steel (Continuous) | 130 - 240 m/min | 0.30 - 0.70 mm/rev | 3.5 - 8.0 mm |
| Soft / Mild Steel | 180 - 320 m/min | 0.40 - 0.90 mm/rev | 4.0 - 11.0 mm |
Compatible Tool Holders:
Due to the 1906 size, this insert must be used with 19-series heavy-duty holders for adequate support:
- External Turning: PCLNR/L 3232P19 / PCLNR/L 4040R19
Roughing Choice: NC3020 vs. NC3030
Selecting the right grade for your large-scale steel turning:
Best for continuous heavy roughing at higher speeds. It offers superior wear resistance and long tool life on stable setups.
Best for heavy interrupted cuts or parts with high vibration. It prioritizes toughness over speed to prevent sudden tool breakage.
Pro Tip: When using the GR chipbreaker on a 1906 insert, ensure your machine has sufficient horsepower. If you experience excessive vibration, try reducing the depth of cut while maintaining a high feed rate.
Packaging: 10 pieces per box.