Korloy CNMG190616-GR NC3030 Ultimate Heavy Roughing Insert, R1.6 (10pcs)
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The Original Korloy CNMG190616-GR NC3030 (ANSI Standard: CNMG 644) is the most robust turning insert in the Korloy catalog, specifically engineered for extreme stock removal in the most difficult steel machining environments. This "giant-scale" insert features a 1.6mm (1/16") nose radius, providing maximum edge reinforcement to withstand violent impacts and high-pressure feeding. The NC3030 grade is Korloy's premier choice for toughness, offering elite resistance to chipping and thermal cracking, making it indispensable for large-diameter forgings and heavy interrupted cuts.
The Heavy-Duty Standard: For massive workpieces where a single tool failure could lead to costly rework, the CNMG190616-GR NC3030 provides the process security needed to plow through uneven surfaces and raw forge skin.
Technical Specifications:
| Brand | Korloy (100% Genuine) |
| ISO Code | CNMG190616-GR |
| ANSI Code | CNMG 644 |
| Grade | NC3030 (Ultimate Toughness CVD Coating) |
| Nose Radius | 1.6 mm (Maximum Edge Security) |
Core Performance Benefits:
- Indestructible Edge: The R1.6 radius provides the largest possible contact area, effectively distributing heat and mechanical force to prevent edge fracture.
- Heavy Roughing Geometry: The GR chipbreaker is designed with a wide, reinforced land to handle massive depths of cut (ap) and large chips.
- Elite Shock Resistance: NC3030 substrate is optimized to absorb high-frequency vibrations and the repetitive shocks of interrupted cutting.
- Maximum Productivity (MRR): Allows for aggressive feed rates, significantly reducing cycle times on large shafts and thick-walled steel components.
Recommended Cutting Parameters:
| Application Scenario | Cutting Speed (Vc) | Feed Rate (f) | Depth of Cut (ap) |
|---|---|---|---|
| Heavy Interrupted Cutting | 70 - 160 m/min | 0.40 - 0.75 mm/rev | 3.5 - 9.0 mm |
| Rough Forged Surface / Scale | 80 - 150 m/min | 0.45 - 0.90 mm/rev | 4.0 - 10.0 mm |
| Continuous Heavy Roughing | 100 - 190 m/min | 0.50 - 1.05 mm/rev | 4.0 - 11.5 mm |
Compatible Tool Holders:
To support the immense forces generated by this insert, we recommend 32mm or 40mm shank holders:
- External Turning: PCLNR/L 3232P19 / PCLNR/L 4040R19
Roughing Pro-Tip: R1.2 vs. R1.6
Choosing the right radius for heavy-duty steel machining:
Best for maximum feed rates and extreme impact. The R1.6 is much more resistant to chipping when hitting forge scale, but requires high machine horsepower.
A versatile roughing choice. It creates less radial pressure than the R1.6, making it better for machines with lower spindle torque or slightly less rigid setups.
Machinist's Insight: In the heavy-duty world of CNMG 1906, the NC3030 grade is your best insurance policy. It survives the "shock" that would shatter efficiency-focused grades like NC3020.
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.