Korloy CNMG160616-GR NC3020 Heavy Roughing Insert, 1.6mm Radius (10pcs)
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The Original Korloy CNMG160616-GR NC3020 (ANSI Standard: CNMG 544) is an industrial-grade turning insert built for extreme stock removal and high-feed roughing of steel. With a massive 1.6mm (1/16") nose radius and a thickness of 6.35mm, this insert provides the ultimate edge strength to prevent chipping under the most intense cutting forces. The GR chipbreaker is specifically engineered for heavy roughing, ensuring stable chip control even at deep passes, while the NC3020 CVD grade offers premium wear resistance for high-velocity production.
Maximum Material Removal Rate (MRR): The 1.6mm radius allows for much higher feed rates than standard 0.8mm or 1.2mm inserts, making it the most productive choice for large-scale steel components.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG160616-GR |
| ANSI Code | CNMG 544 |
| Grade | NC3020 (High-Speed Wear Resistant CVD) |
| Nose Radius | 1.6 mm (Extreme Strength) |
Core Performance Benefits:
- Extreme Feed Capability: The reinforced 1.6mm radius withstands aggressive feeding, significantly shortening machining time.
- Heavy Roughing Geometry: GR breaker is designed to plow through rough surfaces, forged layers, and scale with ease.
- Enhanced Thermal Protection: Thick Al2O3 layer in the NC3020 coating shields the carbide substrate during long, high-heat roughing cycles.
- Maximum Rigidity: The 1606 (CNMG 54) size is 50% thicker than standard 1204 inserts, offering unmatched resistance to mechanical shock.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Standard Carbon Steel | 140 - 280 m/min | 0.40 - 0.90 mm/rev | 3.5 - 9.0 mm |
| Alloy Steel (Continuous) | 120 - 240 m/min | 0.35 - 0.75 mm/rev | 3.0 - 8.0 mm |
| Soft / Mild Steel | 160 - 320 m/min | 0.45 - 1.00 mm/rev | 4.0 - 10.0 mm |
Compatible Tool Holders:
To handle the forces of a 1.6mm radius insert, we strongly recommend 32mm or larger shank holders:
- External Roughing: MCLNR2525M16 / MCLNR3232P16
The "Big Radius" Guide: R1.2 vs. R1.6
How does the 1.6mm nose radius change your machining?
Best for extreme efficiency. It allows for the highest possible feed rates and is much harder to break, but requires a very rigid machine and high horsepower.
A more balanced roughing choice. It still offers great strength but creates less radial pressure, making it safer for slightly smaller lathes.
Pro Tip: When using the 1.6mm radius for roughing, remember that it will leave a larger "staircase" on tapered or contoured surfaces. This is purely for bulk material removal before a finishing pass.
Packaging: 10 pieces per box.