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.
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.